Best Nitrate Remover for Freshwater Fish Tanks: Check Out Our Top Picks

The best aquarium filter for large tanks

Whether you're an experienced aquarist or just getting started, one of the most important tools you can use to keep your aquarium healthy is a water conditioner or nitrate remover. When you fill your tank, you can't just use plain tap water because the elements that make it drinkable for humans are not the same elements that will make the water viable for fish. In this article, we will highlight five water conditioners to determine which product is the best nitrate remover for freshwater.

Nitrate removers and water conditions are products that affect the condition of the water you are using to fill your tank. For example, aquarium salt is a conditioner because you use it to make saltwater. As you read on below, we highlight the best nitrate remover for freshwater which you can use in combination with tap water to make it suitable for an aquarium environment.

Product FAQ

1. What Is the Best Nitrate Remover for Freshwater?

2. What Does the Best Nitrate Remover for Freshwater Do?

3. How Does the Best Nitrate Remover for Freshwater Work?

4. Where Can I Buy the Best Nitrate Remover for Freshwater?

How We Reviewed

In this article, we discuss each product based on its special features, applications, pros, and cons. We aim to provide you with comprehensive information all in one place to help you determine the best nitrate remover for freshwater tanks.

What We Reviewed

Seachem Prime 1000ml
  • Dechlorinates
  • Detoxifies heavy metals
  • Promotes natural slime coat


Seachem Prime is a high-quality nitrate remove good for both fresh and salt water. This solution removes chlorine and detoxifies ammonia by converting the ammonia to a safe, non-toxic form that can be easily removed by your bio-filter. Detoxifies nitrites and nitrates for easier bio-filter removal.


  • Best seller
  • Encourages natural slime coat
  • Detoxifies ammonia, chlorine, and nitrates


  • Smells terrible

API TAP WATER CONDITIONER Aquarium Water Conditioner 16-Ounce Bottle, White (52C)
  • Contains one (1) API TAP WATER CONDITIONER Aquarium Water Conditioner 16-Ounce Bottle
  • Neutralizes chlorine, chloramines and other chemicals to make tap water safe for fish
  • Prevents tap water chemicals from causing gill destruction, tissue irritation and fish death
  • Super strength, high concentration formula
  • Use when adding or changing water and when adding new fish to freshwater and saltwater aquariums


The next product on our list is the super-strength API tap water conditioner. This product neutralizes chlorine, chloramines and other heavy metals toxic to fish. Useful for removing chlorine from tap water in many contexts. The API conditioner does not detoxify ammonia and nitrates.


  • Neutralizes chlorine
  • Economical
  • Super-strength and concentrated


  • Smells terrible
  • Ultra-concentrated. Best for larger tanks.

Tetra AquaSafe Plus Water Conditioner/Dechlorinator, Packaging may vary
  • Quality and performance driven products for your pet
  • Tested for safety and health
  • Provide a better quality of living for your pet with United Pet Group
  • Age Range Description: All Ranges
  • Included Components: Tetraaqua Aquasafe Water Conditioner (33.8 Oz)


The next water conditioner is the Tetra AquaSafe Plus conditioner. It instantly works to neutralize harmful chemicals such as chlorine, chloramines, ammonia, and heavy metals. This conditioner is easy to use and was specially developed for smaller aquariums.


  • Established brand
  • Neutralizes ammonia, chlorine and heavy metals
  • Easy to use
  • Quality product


  • Expensive

Aqueon Central Aquatics Water Conditioner (16 fl oz)
  • Use when filling aquarium with tap water, performing water changes or adding fish
  • Instantly makes tap water safe for fish
  • Supplement for fish that have been stressed, transported or netted
  • Detoxifies heavy metals, ammonia and other elements that are released from fish waste
  • Convenient dosage cap is included


Aqueon tap water conditioner is great for neutralizing chlorine, chloramine, and heavy metals from your water. This brand also restores the slime coat of your fish for better health. The concentrated solution makes this product a great value with reliable performance and easy dosages.


  • Works well
  • High-quality product
  • Made in the USA
  • Doesn't smell like other conditioners
  • Easy to use


  • Poor bottle design
  • Questionable packaging when shipped
  • Does not neutralize ammonia

Fluval Water Conditioner for Aquariums, 16.9-Ounce
  • Makes tap water safe for fish
  • Neutralizes chlorine, chloramines and heavy metals
  • Protects the sensitive mucous membrane of the fish
  • Patented stress reducing formula
  • For fresh and saltwater use


The last product on our list to find the best nitrate remover for freshwater is the Hagen Fluval water conditioner. This solution neutralizes chlorine, chloramines and heavy metals while protecting sensitive membranes of your fish. This product is great for fresh and saltwater tanks.


  • Works well for neutralizing chlorine
  • Good for fresh and salt water
  • Great for general tank maintenance


  • Not concentrated
  • Expensive
  • Requires double dose to remove chloramines

The Verdict

When looking for the best nitrate remover for freshwater, there is one product that stands out far above the rest on this list. The product we recommend as the best nitrate remover for freshwater tanks is Seachem Prime. This is our favorite product because it specifies that this product neutralizes chlorine, chloramines, ammonia, and nitrates whereas its competitors are more vague about the extent of their uses.

The Seachem Prime is ultra-concentrated and sold in various sizes for a great value depending on your tank size. We recommend Seachem Prime as the best nitrate remover for freshwater because of its diverse functions, reliable performance, and its quality formula that keeps fish alive and healthy.



Please enter your comment!
Please enter your name here