API Tap Water Conditioner Aquarium Water Conditioner

Rated 4.7778 out of 5 stars


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$34.42Chewy Price
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About This Item


  • Conditioner that helps remove chemicals and toxins from tap water.
  • Prevents gill destruction, tissue irritation and the uptake of oxygen.
  • Highly concentrated formula detoxifies heavy metals.
  • Treats up to 600 gallons of water with just one ounce.
  • Ideal for starting a new aquarium, adding new fish and changing the water.

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Play Video: Learn More About API From Our Team of Experts
Learn More About API From Our Team of Experts

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About API Water Conditioners

It’s Smart To Be Proactive!

The best way to keep your aquarium clean is to maintain good water quality. This will help keep your fish strong and vibrant and prevent disease. Water conditioners and test kits from API can help you keep your aquarium water safe and healthy.

How Do I Maintain a Healthy Environment?

It is important to test your aquarium water weekly to ensure it stays healthy for your fish.  In addition, a bi-weekly partial water change of no more than 25% will help reduce toxic buildup, remove debris the filter missed, and replenish the oxygen available to your fish.

Feed Twice Daily and Test Water Weekly

Feed your fish twice a day, check their water temperature, and observe them to make sure they are active. You should also test water quality weekly for optimal safety. For fish to thrive, their water must closely match that of their natural environment—poor water quality can cause stress, illness and even fish loss. The 6 important parameters for healthy aquarium water are ammonia, nitrite, nitrate, pH and water hardness (GH & KH). All of these can vary over time and are invisible to the eye.

Change Water and Restore the Ecosystem

In a closed aquarium environment, there are no natural rivers or streams to carry away debris and other waste materials. That is why you should replace 25% of your aquarium water every two weeks, making sure to add water conditioner to your tap water to make it safe for your fish. You should also change your filter media and clean your gravel monthly. Adding beneficial nitrifying bacteria with API Quick Start when you do will help restore your aquarium’s fragile ecosystem and avoid disruption.

What Do API Products Do and When Do I Use Them?

API Test Kits

Use test kits weekly to monitor water quality parameters, which can vary over time and impact the health of your fish.

API Stress Zyme

Using this every week will help keep your aquarium clean and your gravel and ornaments sludge-free.

API Algaefix

Use weekly to control algae growth and keep aquarium glass, ornaments and plants clean.

API Stress Coat

Use every 2 weeks during water changes to make tap water safe, and when adding fish, or when fish are injured.

About API

The team at API has a passion for fish and understands the rewards and relaxation fishkeeping can bring. For almost 60 years, they have developed premium products with a focus on proven and effective results. API offers a range of testing kits, water conditioners and nutritionally superior fish foods. They are dedicated to making a better underwater world for the benefit of fish and those who keep them.

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Fish TypeBetta, Bottom Feeder, Cichlid...Betta, Bottom Feeder, Cichlid...Marine Fish, Tropical FreshwaterMarine Fish, Tropical FreshwaterMarine Fish, Marine Invertebrate
Aquarium TypeSaltwater, FreshwaterSaltwater, FreshwaterSaltwater, FreshwaterSaltwater, FreshwaterSaltwater

Questions & Answers

7 Customer Questions

Can you use it for salt water
Answer by ChewyMar 21, 2021
This treatment dechlorinates aquarium and tap water, detoxifies heavy metals, and may be used in both fresh and salt water.

Can i put just the water in the tank or do i need to mix it with tap water??
Answer by ChewyJul 07, 2020
This water conditioner is intended for use when setting up an aquarium and when adding or changing water. It instantly removes chlorine and chloramines, and detoxifies heavy metals to make tap water safe for fish.

Is this safe and effective for red eared slider turtles ?
Answer by ChewyMay 14, 2020
The API Tap Water Condition can be used with any aquatic pet, including any of the aquatic turtles.

Is this product safe to use with tiny shrimps and crawfish?
Answer by ChewyFeb 13, 2023
This dechlorinator is appropriate for all aquarium critters needing dechlorinated water, including crustaceans.

ReviewsWrite a Review

Rated 4.7778 out of 5 stars
9 Ratings
Would recommend to a friend

9 Customer Reviews

Rated 5 out of 5 stars
By Heather on Nov 20, 2023

THIS is the one you want!

I love this condensed version so much better! I use less, it lasts longer, it works great and I can have it auto shipped to my door!

Rated 5 out of 5 stars
By Frank on May 9, 2023

great price

great product I have been using it for 20 years

Rated 5 out of 5 stars
By Saso on Sep 9, 2022

It works if you use it so use it you'll love it

Tried other conditioners but fish tank remained very cloudy. Poured two servings and overnight tank was crystal clear.

Rated 5 out of 5 stars
By ROBERT on May 9, 2022



Rated 5 out of 5 stars
By Michael66 on May 19, 2021

Always my first choice

Have been using this product for decades. Always does exactly what it’s designed to do. Trust it to neutralize chlorine and keep fish from harm.At a very reasonable price. Thank you very much.

Rated 5 out of 5 stars
By Filters on Feb 22, 2021

Perfect size for many usages

Great portion for the amount of usage I need. The quality if great! love the measure cup!

Rated 3 out of 5 stars
By Fish on Nov 14, 2020

Water conditioner

Although this was wrapped with cap very tight, it still managed to leak a little in the box

Rated 5 out of 5 stars
By RCHP on Jun 18, 2020

API rap water conditioner aquarium conditioner

I added this product right after I finished cleaning the tank and all of my fish survived!

Rated 5 out of 5 stars
By Justine on Mar 4, 2020

Best Value for Size

This is the best price for the size that I can find. Great to have a slightly bigger size bottle or water conditioner when you have a large fish tank and you go through this stuff all the time. Shipped quickly and got to my house safely without any damage to the bottle.