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What Causes High pH in Aquarium?

fish and coral on aquarium

If you have an aquarium, you have to take care of the chemical balance of your water. Your fish will affect the makeup of the water, so it is wise to check it and adjust it as needed. If you have an unbalanced tank, your fish might not flourish. To avoid problems like high pH in your aquarium, learning why it increases is helpful. When aquarium water is unbalanced, and the pH levels are off, the water will be either acid or alkaline. Levels are measured on a scale of 1 to 14 with these ranges:

  • Acid: 1-6.9
  • Neutral: 7
  • Alkaline: 7.1-14

What Causes High pH in an Aquarium?

kaunis kala-kala on a big aquarium

Image by pixabay

So, what causes high pH in an aquarium? There are several reasons. The rocks and gravel in your tank can increase the pH level because the calcium in them dissolves into the tank. Another reason why levels increase is due to plants in your tank. When plants absorb carbon dioxide and nitrates, pH levels increase. 

A high alkaline environment can be dangerous for aquarium fish. If there is too much alkalinity in the water, fish can develop alkalosis, and their swimming becomes excited and chaotic. Their fins will be wide open, and you might notice mucus in them. Some types of fish might show alkalosis by swimming slowly and with labored breath. 

Your tank might also show signs of high pH. Aquariums with high pH have algae growth and slime on the plants and decorations. Most fish prefer neutral pH, deviations from it can be toxic for them. 

It is essential to understand what causes pH to increase and how to remedy it if you want to keep your fish healthy. In most cases, aquarium water pH lowers over time. By adding small amounts of tap water, you can quickly increase the pH, but if it gets too high, you have to learn how to lower it.

What Raises pH in An Aquarium?

kitten akvaario bengali pet kala

Image by pixabay

Adding Tap Water to An Aquarium

One of the quickest ways to increase the pH level in a fish tank is to add tap water. The pH levels can also increase when people add new fish in their bags as the water is often from the tap. City water systems often have high alkalinity which can change the way that water tastes. It can also build up scale in plumbing systems and coffee makers. 

Humans will not have problems drinking water with high alkalinity, but fish do. That is why tap water does not work well for them. 

Not Changing the Filter

Because fish leave waste in the aquarium, it is essential to change the filter regularly. Their excrement and other material from food and chemicals in the water can increase the pH levels. When the filter no longer functions appropriately, those waste products stay in the water, and your fish suffer. 

Pick a day each month to change the filter in your tank. If you find that the filter gets dirty before the date arrives, then change it more frequently. If you want your fish to live, then you have to take care of the tank. 

Some fish owners will also clean the tank each time that they change the filter. Most filters will not catch all of the waste products, so cleaning the tank is the only way to get rid of everything that could increase the alkalinity. An aquarium vacuum makes it easy to get rid of leftover food and waste. 

When you change the tank filter, the water will have more carbon dioxide which lowers the pH levels. Another way to lower pH is to add vinegar, which is actually an excellent substance to use to clean the interior glass of your aquarium. 

Different Types of Tank Features

There are some tank features that lower the pH in the tank. There are also features that will increase the pH levels, too. Shells and crushed coral increase pH levels. There are some fish that actually like high pH levels, like African cichlids. But most fish prefer neutral numbers. 

Limestone is another rock that increases pH levels. Unfortunately, many people add stones that increase pH levels without knowing what they are doing. 

Some types of chemicals will also increase pH levels. If you buy your aquarium somewhere other than a dedicated pet store, you might be using unnecessary chemicals that do more harm than good. Read the chemicals before you put them in your tank. 

No Driftwood

If you have too much pH in your aquarium, notice what is missing. Adding driftwood to your tank will begin the process of lowering the pH levels. Along with driftwood, peat moss will quickly neutralize your aquarium. You can put driftwood at the bottom of your tank and peat moss in your substrate or filter. 

Not Enough Carbon Dioxide

CO2 lowers pH levels, too. If you have high levels of pH regularly, you might want to get a pH pump to add the necessary standards to your tank. Cleaning the filter or replacing the filter lowers pH levels by improving circulation.

What is the Best pH for an Aquarium?

 anemone fish on aquarium

Image by ​pixabay​

In a freshwater aquarium, the best pH level is low to neutral, between 5.5 and 7.5. Saltwater fish prefer a high pH, around 8.0 or higher. Freshwater fish do not like salty water, and saltwater fish do not like unsalted water. Unfortunately, no matter what type of fish you have, maintaining the perfect pH is not always easy to do. 

If your tap water is hard, it will raise the pH levels in your tank every time you fill it. If you have freshwater fish and hard water, put your tap water through a water filter to quickly lower the pH levels. You should test your aquarium’s water regularly, especially after you have added tap water. 

Once you’ve tested the water, you should fix any pH problems that you find. If you wait too long to adjust the alkalinity levels, your fish might die. When pH increases, ammonia and other harmful chemicals increase. Fish cannot adapt to pH levels that are too high.

Monitor pH Levels

surgeon fish

Image by pixabay

When you buy a new tank, you should closely monitor the pH levels. You should pay close attention to your fish and their behavior as you break-in the new aquarium. Young fish often struggle when pH levels are off, and new tanks can have unexpected issues. 

It is commonplace for certain types of fish to have tight pH ranges. And, some fish will not reproduce if the pH levels are off by just a little bit. When you build a new tank and add new fish, be sure that they all need the same pH. 

There are several ways to test pH levels. You can use a pH test kit. You put water into a test tube and squirt the required number of drops of pH solution into the test tube. The water will turn color, and you compare it to the levels on a test kit card. It usually takes a few seconds for the test tube water to change color, but these tests are accurate. 

Unless you haven’t clean the fish tank or filter recently, the pH in your fish tank should be close to the pH of your tap water. You can test your tap water with the same test kit you used to check the water in your tank. Most fish parents will test the water twice per month. 

If you notice that the pH numbers are too high or too low, you should keep a record of the numbers. Include filter changes and tank cleanings in the log, too. This will give you the information you need to evaluate how your water changes. 

It is a good idea to check your water in two situations. The first is before you add a new fish. Test the water in the fish’s bag and tank so you can determine if you have to make any changes to the water in either place. You should also check the water if a fish dies in your aquarium to see if pH levels caused it.

Why You Can’t Mix Different Types of Fish

You wouldn’t want to put goldfish in the same tank as neon tetras. Goldfish like neutral water with a pH range of 7.0 to 7.5. But, neon tetras prefer acidic water with a lower pH of 5.8 to 6.2. If these two types of fish share an aquarium, one will not thrive. Most pet shops keep similar fish species in the same tanks because of their preferred pH numbers. 

As an aquarium owner, you should also be aware of what your fish will do when you have to take them out of the tank. Many fish experience trauma when moved from the water at the pet shop to the water in their new home’s fish tank. Fish can experience shock and may not survive the move.

Best All In One Reef Aquarium

best all in one reef aquarium

Reef tanks are beautiful and a joy to own and observe, but they can be expensive if you don't do your research before starting. The following is a list of seven carefully researched tanks that will save your time and money. Investing in the best all in one reef aquarium upfront will save you from the tiresome and expensive trial-and-error process.

Comparison Table




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Frequently Asked Questions

1. What Is an All in One Reef Tank?

2. How Does an All in One Reef Tank Work?

3. Where Can I Buy the Best All In One Reef Aquarium?

How We Reviewed

yellow fish and coral reefs

Image source: Pixabay

The following seven products were reviewed based on the following parameters: features,pros & cons, where to buy, and warranty. We spent time researching these products and considering the experiences of verified buyers to bring you this complete list of the best all in one reef aquariums.

What We Reviewed

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Key features of this product include ultra -thick and high-clarity glass, a long, thin design that enhances the ability to view the aquarium's contents, and customizable equipment options. A separate chamber on the end can house your heater and wiring. This aquarium has a 20-gallon capacity. When shopping for the best all in one reef aquarium, remember that the higher the tanks capacity, the easier it will be to maintain.


  • Customizable
  • 20-gallon capacity
  • Included filtration system


  • Does not include a lid
  • Does not include lights or accessories


Innovative Marine offers a 1-year limited warranty on all electrical components and a 6-month limited warranty on non-electrical parts.

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The Coralife LED Biocube Aquarium features a hood with built-in LED lighting. The lighting system includes a 24-hour timer and three lighting settings: bright white, sparkling blue, and color-enhancing. You can even set the lights to replicate sunrise and moonrise.


  • Compact, quiet, customizable filtration system
  • Excellent lighting system
  • Two sizes to choose from (16 and 32)


  • Does not include stand or skimmer


Coralife offers a 1-year limited warranty on this product.

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Key features of this product include a concealed filtration area at the back of the tank, 11000K high-output LED lighting system with day and night illumination settings, and a 3-stage filtration system.


  • Powerful lighting system
  • Oversized filtration system
  • Price


  • Small 5-gallon capacity can make the environment difficult to maintain
  • Lighting system not suitable for SPS (small-polyped scleractinian)


Fluval offers a 2-year limited warranty on its aquariums.

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Key features of this product include a cabinet with doors to store supplies and display your aquarium and a stylish rimless tank. This kit also includes skimmer, sump, a return pump, and various pipes, tubing, and filter media.


  • Included cabinet
  • 50-gallon capacity
  • Lots of included supplies and accessories


  • Expensive


SCA offers a 3-year manufacturer's warranty for the tank itself. All accessories such as pumps and filtration systems have a 1-year warranty.

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The Red Sea Max Nano is designed especially for keeping live corals and small fish. It is a complete all-in-one kit and comes with an LED light system, a filtration system, and a protein skimmer.


  • Comes with everything necessary to get started
  • The filter has a multi-directional nozzle that keeps water moving sufficiently for coral growth
  • Comes with a Wi-Fi lighting control app for your phone or tablet


  • May require separate purchase of a heater and stand


Red Sea offers a 12-month manufacturer's warranty on its products.

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This aquarium kit comes in three sizes and comes with most everything you need to start a reef tank, making it a great option for beginners. It comes with a clip-on filter, filter cartridges, natural-daylight-effect LED lights, water conditioner, biological supplements, a fish net, and an aquarium fish guide. It is truly a great value.


  • Comes with lots of supplies and accessories
  • Quiet filter
  • A versatile tank that can be used for freshwater, saltwater, or reef environments


  • Low capacity (5 or 10-gallon options) not ideal for reef tanks
  • Does not include a skimmer


Marina offers a 1-year limited warranty on this product.

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The JBJ Nano Cube DX Aquarium comes in two sizes: 12-gallon and 24-gallon. It includes a filtration system and cooling fans, manual day and night lighting, and a plastic cover and lid.


  • Includes many needed accessories
  • A versatile tank also suitable for freshwater setup
  • Panoramic view


  • Acrylic plastic instead of glass (not as scratch resistant)


JBJ offers a 1-year warranty on its products. Extended warranties of up to three years are available.

The Verdict: The Best All in One Reef Aquarium

Taking into consideration price, value, and included accessories, the Marina LED Aquarium Kit appears to be the best all in one reef aquarium for beginners. For those more experienced, the SCA Starfire Aquarium will be worth the investment. This sophisticated system has everything one needs to take their hobby to the next level, making it the best all in one reef aquarium for those who are more experienced.

Fluval 306 Review: A Canister Filter To Keep Your Tank Spotless

fluval boxes

A quality filter is a must-have item for your aquarium setup. A filter will improve water quality and reduce the need for cleaning your tank. The Fluval 306 is a favorite among hobbyists thanks to its sturdy design and powerful pump. Our Fluval 306 review will walk you through the features of this canister filter and help you decide if this filter is the right product for your tank.

What Is The Fluval 306?

The Fluval 306 is a performing canister filter from aquatic equipment manufacturer Fluval. It’s a sealed system that requires very little maintenance. Another advantage of the canister design is that the filter is easy to set up.

A canister filter pumps water out of the tank. The water goes through filter media as it circulates through the filter. The filter then pumps clean water back into the container. Canister filters are ideal for large tanks that need continuous filtering.

The Fluval 306 is an exterior filter. You will need to place this filter on the side of your tank or set it up under your tank. This design is more discreet, and you can easily hide the filter in a cabinet.

Fluval has been around since the 1970s. This manufacturer offers a wide range of quality products, including a line of filters. We recommend Fluval products for your tank since there is a team of dedicated experts who genuinely care about developing the best aquatic products possible behind this brand.

The Fluval 306 is part of a larger line of canister filters. The 306 model is a medium-sized filter compared to the other products of the line.

You can use this canister filter in a tank with a capacity of up to 70 gallons, but Fluval recommends that you use this filter in a container that doesn't exceed 30 gallons. However, it seems reasonable to use this filter in a tank with a capacity greater than 30 gallons as long as you don't stock your fish tank too heavily. You can use the Fluval 306 in a freshwater or saltwater tank.

How Does The Fluval 306 Filter Work?

The filter features two valves at the top. The pump sucks water in through the inlet valve. The water circulates to the bottom of the filter before going back up. As the pump sucks the water back up, it goes through different layers of filter media.

The filter stores filter media in three separate baskets. The upright canister design allows you to use more filter media compared to other models.

You will find the pump motor in the cover of the filter. The filter features secure lock clamps to keep the filter closed. You can easily open the lid and remove the different baskets whenever you need to replace filter media. There are some built-in dampeners to reduce the noise of the motor.


​Image Source: www.ebay.com.au

The filter comes with nuts and rim connectors. You can use these components to secure the input and output lines that will run to the tank. The nuts and rim connectors are quality products that will prevent leaks.

We like the casing of the filter. The sturdy plastic casing is water-resistant and will protect the interior of the filter.

The filter comes with ribbed plastic hoses. The diameter of the hoses is ½.” You can easily connect another type of hose to the filter if you want to create a customized setup.

The intake design prevents clogs from forming in the filter. The valves are another standout feature. The quality of the valves makes the Fluval 306 a durable option.

There is a priming button on the filter. This feature will help you get started with this product. You can push this button to get the filter to start pumping water automatically without having to create a siphon manually. Priming can be noisy, but it's a process that shouldn't last more than a few minutes.

Fluval offers a three-year warranty on this product.

A Quick Guide To Filter Media

The Fluval 306 comes with three baskets you can fill with filter media. This design allows you to create a customized three-stage filtering system for your fish tank.

The first filtering stage uses mechanical media. The filter comes with foam pads that prevent clogs by catching large debris.

The middle basket contains biological filter media. The purpose of this stage is typically to eliminate ammonia. You can use carbon, polyester, bio rings, peat granules, or a phosphate filter. This type of media allows beneficial bacteria to thrive, and some of these items double as an additional mechanical filter.

The last filtering stage uses chemical media to remove toxins. It's essential to place the chemical media last since it can be harmful to the bacteria that live in the biological filter media. 

Fluval offers plenty of add-ons for this filter, but you can shop for filter media from any other manufacturer. You can easily design a filtering system adapted to the size and population of your fish tank with these three filter baskets.

What Are the Specs of the Fluval 306 Filter?

The filtration volume of the filter is just under seven liters or roughly above 236 fluid ounces. You can use significantly more filter media than with a round filter or another design.

The 303 GPH flow rate is another interesting spec. This fast flow rate allows you to keep your fish tank spotless, even if you have a lot of fish or stock it with species that require continuous filtering.

Here is a quick summary of the main specs you should know about:

​Product name

​Fluval 306

​​Recommended for

​​Tanks up to 70 gallons

​​Freshwater or seawater


​​Number of filtration stages



​​External canister filter

​​Flow rate

​​303 GPH, or 110L/H

​​Filtration volume

​​236 fl oz, or 6.94L






​​Three-year warranty

​​What’s included?

Valve assembly
Rim connectors
Rubber connectors
Some sellers include filtration media

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How Does the Fluval 306 Compare to Other Filters?

There are a few other products to consider if you need a filter for your aquarium.

Penn Plax Cascade 1000 Canister Filter

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The Penn Plax Cascade 1000 features an easy primer mode similar to the one you will find on the Fluval 306. There is a valve that automatically adjusts to the water flow.

The 110V motor is less powerful than the Fluval 306. This pump motor is an advantage if you are looking for a canister filter that uses less power. The downside of this 110V motor is the reduced flow compared to the Fluval 306.

You can use the Cascade 1000 filter for a tank with a capacity of up to 100 gallons. The flow is 265 GPH, which is lower than the 303 GPH flow of the Fluval 306. Unless you keep your tank heavily stocked, the reduced flow shouldn’t be an issue.

The canister design is very similar to the Fluval 306. The water goes in and out of the filter through the valves you will find on the cover. You can easily open the filter to replace filter media. The water goes to the bottom of the filter before going through the three filtering baskets. 

The valves are an exciting feature since they are different from the ones you will find on the Fluval 306. The valves automatically adjust to the flow of water and can rotate. The valves of the Fluval 306 are less flexible, which can limit you when you set up the filter.

You can place the Cascade 1000 anywhere around your tank and easily install the water lines regardless of the angle thanks to the rotating valves.

The filter comes with tubing, spouts, foam filter media, and a spray bar. The dimensions are 11.5x17x10,” which makes the filter bulkier than the Fluval 306.

​Product name:

Penn Plax Cascade 1000


​three-year warranty

​Aquatop CF Series Canister Filter

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The Aquatop CF Series canister filter is similar to the Fluval 306 filter in terms of price, but it comes with some features that are missing from the Fluval 306. You need to ask yourself whether or not you need these additional features.

The Aquatop canister filter uses five stages of filtration. It has a flow of 525 GPH that is superior to the performance of the Fluval filter.

One of the additional features is a 9-Watt UV sterilizer light. The purpose of this filtration stage is to eliminate bacteria and some algae spores with a UV light.

The Aquatop CF Series canister filter stands out thanks to its quiet operation. It’s slightly bulkier than the Fluval 306 with dimensions of 18x12x11.”

The design is very similar, but you will notice that the base is larger. This base makes it easy to have the filter stand upright next to your fish tank.

You will find the intake and output valves on the cover of the filter. The first filtration stage is for UV light. The water will then go through four filtration baskets.

The filter comes with carbon pads and ceramic rings or balls. Aquatop offers many different filter media, including foam pads and additional biological and chemical media.

You can use this filter with a tank that has a capacity of up to 125 gallons. The filter comes with valves, hosing, clamps, and a spray bar. It features a 120V motor pump so energy use should be very similar to the Fluval 306.

Product name:

Aquatop CF Series Canister Filter


three-year warranty

We looked at the different features and specs of the filter to create this Fluval 306 review. The canister filter stands out thanks to its sturdy design, flow rate, and performing 120V pump motor. The reviews for the filter are excellent, and we highly recommend it because it's obviously a quality investment of your aquarium setup.

The main downside of the product is the price. It’s possible to find canister filters with similar specs in a lower price range. However, quality might be slightly lower than what you can expect from the Fluval 306.

Pros And Cons Of The Fluval 306 Canister Filter

We looked at the different features and specs of the filter to create this Fluval 306 review. The canister filter stands out thanks to its sturdy design, flow rate, and performing 120V pump motor. The reviews for the filter are excellent, and we highly recommend it because it's obviously a quality investment of your aquarium setup.

The main downside of the product is the price. It’s possible to find canister filters with similar specs in a lower price range. However, quality might be slightly lower than what you can expect from the Fluval 306.


  • ​Easily create a customized filtering system
  • ​High-quality product
  • ​Flow rate
  • ​Suitable for large tanks
  • ​Makes a noticeable difference in terms of water quality
  • ​Comes with everything you need


  • ​Set up can be complicated for novices
  • ​120V motor uses more energy

Verdict And Rating

After researching the product to write this Fluval 306 review, we think the filter deserves a rating of four out of five stars. The filter stands out thanks to its flow rate and sturdy build.

However, other products deliver a better flow rate or have more filtering stage in a similar price range. It’s possible to find canister filters that are more affordable and come with more accessories. We recommend the Fluval 306 if you are looking for a quality long-term investment, but we think there are other options to consider if you are shopping on a budget.

Why is My Fish Tank Cloudy: Top 10 Reasons

Goldfish on a fishtank
Image via Unsplash

Any gorgeous fish tank can turn into a nightmare when the water develops a mysterious, cloudy consistency. For many fish owners, seeing their tank's water change from clear to murky white or brown can be incredibly frustrating, as there are many possible causes.

So, how many different causes could there be for a murky fish tank? Well, research shows that there are ten common reasons a fish tank may become cloudy. 

Once you’ve diagnosed the cause or causes, you can find a solution! Depending on the cause of your water problems, the answer could be as simple as adding more water to your tank. Instead of wondering, "Why is my fish tank cloudy?", know why and get it back to pristine condition today.

What Are the Signs of a Cloudy Fish Tank?

A cloudy fish tank will have water that appears white, gray, or green. You will not be able to see objects or fish clearly or correctly. 

Cloudy fish tanks may also produce a pungent scent, due to an excess of phosphorus in the water. If your tank’s water is not clear and easy to peer through, you have a cloudy fish tank.

What Are the Dangers of a Cloudy Fish Tank?

Cloudy fish tanks are a symptom of unclean, unfiltered water. Because fish live and breathe in the water in your tank, they are dependent on that water's clarity and cleanness and free from harmful chemicals, particles, and elements.

A cloudy fish tank can not only make your aquarium unattractive, but it can prove potentially fatal to your fish. Figuring out why your fish tank is cloudy is the first step to saving your fish from illness, stress, and death.

Yellow fish on a

Image via Pixabay

Why Is My Fish Tank Cloudy?


Gravel Residue

If you’ve recently purchased a tank and set it up, you may notice that a cloud of whitish or gray “powder” seems to float upwards from the bottom of your tank. If you’re using gravel as the base of your tank, you’re likely to deal with “gravel residue” immediately after installation. 

The powdery particles that cover the gravel loosen themselves and are filtered out of the tank via your mechanical filter. Should you let this residue settle back onto the gravel, you will continue to see problems with clarity of your water.

If you'd like to avoid the situation altogether, wash your gravel before filling your tank. Just rinse the gravel in a large container – you can even use your empty tank – and run water through it and across it until the water begins to run clear. Then cover the clean gravel with clean, clear water.


Dissolved Particulates

Unlike the particulates that rise from unwashed gravel, suspended particulates in your tank water may come from a poor-quality tap or groundwater that is heavy in dissolved phosphates, nitrates, heavy metals, or silicates. Not only is this water not very good to drink, but it's also not suitable for your fish or your tank's water clarity.

You can purchase a conditioner to use in your water, and that can help correct pH issues related to dissolved particulates. Having a high-quality water filter can also help, but perhaps the best solution to water that is dense with suspended particulates is a reverse osmosis machine. To have the most transparent and clean water possible, it is always best to use filtered water, and using reverse osmosis is one of the most efficient ways to turn cloudy water transparent.



If you set up your tank a short while ago and are now wondering, “Why is my fish tank cloudy? My gravel is clean, and the water I used was clean and clear!” you may be dealing with a bacterial bloom. Good bacteria, strains that will clean the water and keep it clear, take many months to develop, and in the meantime aquatic plants may die and begin to rot, or excess decaying food may sift down to the bottom of the tank.

The excess number of bacteria that is organically generated by these decaying processes can make your water cloudy and dark. Correct feeding and removal of rotting plants can solve this problem nearly instantly but having an active filter will also help.


Algae Growth

Is the water in your fish tank green? The culprit is algae. While seeing algae growing is usually considered a good sign, as it means living things can survive in your tank without too much intervention. However, when it starts turning your tank green, spreading over the glass, or causing breathing issues for your fish, it is time to get rid of it. 

There are a few causes of algae spread through your tank. Too much sunlight can cause algae to reproduce, and the presence of too many nutrients, including phosphorus and nitrates, can feed algae too much and cause it to take over. Monitoring your tank's pH and nutrient levels are crucial to keeping algae levels under control.

Bunch of fishes looking at the camera

Image via Pixabay



When there are too many fish inside of your tank, things go downhill quickly. Not only do your fish become stressed from the cramped environment, but the reservoir also fills with detritus in the form of dead skin, decaying plants, rotting feces, and dead fish.

Cleaning and removing these wastes can be nearly impossible with an overpopulated tank, and maintenance is likely to be constant. Ensure that you are not keeping too many fish in your tank, and you may immediately see improvements in the water quality!



Though it may seem wise to feed your fish every day, in most cases, it is unnecessary and only leads to murky water. Any food that is ignored by your fish ends up becoming a rotting mess at the bottom of the tank.

Most fish are perfectly healthy when fed once every two or three days. Although it is vital to research your species' specific needs, it also essential to keep in mind that fish do not eat as often and as much as terrestrial pets and animals.

The more you overfeed your fish, the more work you will need to put into keeping your tank clean.


Improper Water Changes

Frequent water changes are a must for any tank. Removing approximately 10% of the water in your tank and replacing it with clean water every week is the proper way to keep your water clear.

Small, frequent water changes will ensure that you’re not disrupting the beneficial bacterial base while keeping rotting plant matter and uneaten food from spoiling your tank’s water quality.


Chemical Reactions

When adding various chemicals to the water in your tank, it is essential to remember that chemicals react. If you notice that the water in your tank had become cloudy after applying chemicals, be sure to test the chemicals used in separate glasses of water to determine which one is causing the cloudiness.

Limiting the use of chemicals is also a great way to limit the amount of cloudiness caused by them, and with the full range of natural amendments and filtration systems available today, it has never been easier to keep a clean and bright fish tank free of synthetic or excess chemicals.


Faulty Filter

Proper filter maintenance can help tremendously in keeping your tank clean and bright. With a high-quality filter and regular cleaning of that filter, you'll never have to wonder "Why is my fish tank cloudy?" ever again! Typically, there are three types of filters available to fish tank owners:

  • Biological – Bacteria, microorganisms, plants and fungi that naturally filter waste and toxins from the water.
  • Mechanical – Physical filtration using an automatic device that takes in water, pushes it through a filter, and expels it back into the tank, clean and bright.
  • Chemical – Chemical filtration comes in the form of charcoal filters placed inside the tank. The charcoal acts to filter out toxins in the water, but it must be changed often.

The best filtration system is one that combines all three types, with biological methods far outweighing chemical means of filtration.


Wooden Decorations

Wooden decorations can do wonders in a fish tank. They can lower the water’s pH, boost the immune systems of your fish, reduce stress, improve appetite, and even encourage mating! 

Wooden decorations do this by naturally releasing tannin, a chemical that can turn your clear water a soft yellowish or brownish color. While the coloration might not be the most pleasing, your fish will love the benefits of the tannin, so the choice of whether to use wooden decorations is up to your preferences.

A cloudy tanky is bad news. To ensure it doesn't happen, you have to properly balance the tank's water in terms of pH, nutrients, etc. Here's an idea of how to achieve that "perfect balance" in your fish tank or aquarium... 

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Best Food for Guppies in the Market

what's the best food for guppies

Image from Pixabay

Guppies are popular pets because they're simple and hardy fish with bright and beautiful colors. Guppies are great in communities and are often added to already existing aquarium communities. As with any animal, you will wonder what kind of food for guppies you should buy. There are dozens of brands out there, and it's essential to learn specifics about brands before you pick one for your fish.

Guppy Food FAQs

Not sure where to start? Here's where to learn more about food for guppies, what types there are, and where to find it.

What Is Food for Guppies?

How Does It Work?

Where Can You Buy It?

How We Reviewed Food for Guppies

Some people say they're “just fish,” but true animal lovers know these fish are just as important as any other pet. We understand that choosing the diet and food for guppies is important to maintaining a healthy and thriving fish tank. The following foods were reviewed based on  features, such as color vibrancy, nutrition, vitamins, and other important factors.

What We Reviewed

  • TetraMin Nutritionally Balanced
  • Omega One Super Color
  • New Life International Spectrum
  • API Flakes
  • Zoo Med Spirulina 20 Flake Fish Food
  • Hikari USA Tropical Fancy Guppy Food
  • Hikari Bio-Pure Freeze-Dried Blood Worms
  • Hikari Bio-Pure Freeze-Dried Brine Shrimp
  • New Look!
  • Upgraded formula now with prebiotics!
  • Nutritionally balanced for optimal health
  • Easily digested, leaving less waste in your tank
  • packaging may vary


TetraMin recently upgraded its formula, and this nutritionally balanced diet is made for active fish and includes Omega-3 acids which is why it's great for guppies. Included is also a blend of proteins to help promote growth, health, and colorful scales. This formula won't cloud the water.


  • Omega-3 acids
  • Proteins
  • Won't cloud water


  • Previous formula is not as powerful
  • Complete food for all fish
  • Made with whole fresh Seafood from sustainable fisheries
  • Naturally occurring pigments for vibrant colors
  • Rich in OMEGA 3 & 6 for strong immune systems
  • Less starch; less waste. Low ash for cleaner water
  • Included Components: Fish Food
  • Included Features: Aquarium Natural Meal Free
  • Low Ash Fresh
  • Age Range Description: All Life Stages


This formula does exactly what it sounds like: it keeps your fish's color bright and vibrant. This formula also prevents clouding and has no pre-processed proteins which is better for your fish's digestion.


  • Keeps your fish vibrant
  • Prevents clouding


  • Is pricey
New Life
  • 687916405404
  • New Life Spectrum
  • Goldfish Sinking 300gm
  • "New Life Spectrum food is made with high-quality easily digestible South Antarctic Krill, Herring,
  • All New Life Spectrum products also contain a generous inclusion rate of Garlic (Allium Sativum) wit


This formula gives your fish tons of energy to play and swim around. It is packed with 50 percent protein, so it is ideal for smaller fish that are more active than other species. This food also does not cloud the water and contains particles of seaweed, kelp, and fruits and veggies.


  • 50 percent protein
  • Will give your fish a lot of energy
  • Fresh ingredients


  • Unavailable on Amazon
  • Contains one (1) API TROPICAL GREENS FLAKES Tropical Fish Greens Flakes Fish Food 2.1-Ounce Container
  • Contains key nutrients for a complete and balance diet for all tropical community fish
  • Includes ingredients like spirulina and beet pulp to enhance vibrant colors of fish
  • Formulated for easy digestion, leading to less toxic ammonia and cleaner, clearer water
  • Feed twice a day the amount of food your fish will consume in three minutes


Since tropical fish like guppies need a balanced formula, API flakes for tropical fish is perfect. High on the ingredient list is spirulina, which is nutritional and makes your fish look vibrant and healthy. The flakes are small and easy to digest, so you will encounter fewer issues with toxic ammonia.


  • Has spirulina
  • Easy to digest


  • Small bottle is pricier than other brands
  • 3 Pack of Zoo Med Spirulina 20 Flake Fish Food,
  • 4-Ounce Each
  • Spirulina is rich in raw protein
  • For fresh or saltwater fish
  • Enhances breeding
  • Made in the U.S.A.


This food is filled with spirulina, which is rich in raw protein. This is great for everyday feeding for both fresh and saltwater fish—and even encourages breeding since it stimulates hatching rates. This food is easy to digest, so you can avoid toxic ammonia in the water. There are also 7 crucial vitamins, such as vitamins A, Bs, C, and E.


  • Encourages hatching rates
  • Rich with raw protein and vitamins
  • Is for many types of fish


  • Is expensive
  • Hikari tropical Fancy Guppy .77oz
  • Fancy Guppy was developed as a result of extensive research
  • Purpose of improving their breeding habits, growth rates, overall health and resistance to disease


This formula is specifically aimed for those who want to improve their guppy's breeding, growth, and resistance against diseases. The pellet goes soft when it hits the water and is a natural color enhancer for your vibrant and beautiful fish. However, you must remove any excess food to prevent clouding.


  • Great for breeding
  • Specifically made for helping guppies become resistant
  • Color enhancer


  • Could cloud the tank easily
  • Does not focus on nutritional benefits
  • Patented Ratcheting Dispenser Top
  • Will not cloud the water
  • Multi-vitamin rich to reduce stress and stress related diseases
  • Free of parasites and harmful bacteria
  • Nitrogen charging reduces oxidation prior to opening


What we like best about this product is that the freeze-dried blood worms are fresh and high in protein. The freeze-dried technique helps preserve freshness and the high nutrition of live bloodworms. This food also is rich with multi-vitamins that help reduce stress, so your guppies will live a long and happy live.


  • The freeze-dried blood worms allow for the utmost nutrition and protein
  • Has anti-stress vitamins


  • May have to remove any excess from the water
  • Patented Ratcheting Dispenser Top
  • Will not cloud the water
  • Multi-vitamin rich to reduce stress and stress related diseases
  • Free of parasites and harmful bacteria
  • Nitrogen charging reduces oxidation prior to opening


Much like the freeze-dried bloodworms, this freeze-dried brine shrimp formula is great for nutrition as they pack it with frozen and fresh plankton harvested from the ocean. It also comes with multi-vitamins that help reduce stress for a happy and thriving tank.


  • Filled with nutrition and fresh plankton
  • Multi-vitamins help prevent stress


  • Is actually plankton
  • May have to clean the tank for excess food

Which Is the Best Food for Guppies?

Based on our extensive research on these 10 popular brands of food for guppies and like tropical fish, we think the Hikari Bio-Pure Freeze-Dried Blood Worms is the best food formula for your guppies. This is because it is filled with fresh and nutritious blood worms, which is the fish's natural diet in the wild. You can purchase the freeze-dried blood worms on Amazon, Chewy, or your local pet store.