API Tap Water Conditioner Aquarium Water Conditioner, 32-fl oz bottle

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About This Item

Details

  • 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.

Instructions

Learn More About API From Our Team of Experts

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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Questions & Answers

8 Customer Questions

Do I need to use Stress Coat with this product?

Answer by Chewy • Mar 03, 2020
The Tap Water Conditioner provides full dechlorination. The Stress Coat can be used in addition, but only for the additional properties such as stress relief of the fish or healing. The Stress Coat can be used by itself for both dechlorination and additional health benifets to the fish.

Can you use it for salt water

Answer by Chewy • Mar 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 Chewy • Jul 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 Chewy • May 14, 2020
The API Tap Water Condition can be used with any aquatic pet, including any of the aquatic turtles.
Reviews
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4.8
Rated 4.8 out of 5 stars
96 Ratings
Terms & Conditions

22 Customer Reviews

Rated 5 out of 5 stars
By Alissa on Dec 1, 2025

It works exactly as it's supposed to.

Switched from Prime to this when Prime got pricey and it works exactly as it should. Been using it for years.

Switched from Prime to this when Prime got pricey and it works exactly as it should. Been using it for years.

Rated 5 out of 5 stars
By Linda on May 31, 2025

Works well and cost effective

Declorinate your tap water before using for aquatiums, water changes etc. I like all API products. Not sure how this differs from API StressCoat except StressCoat

Declorinate your tap water before using for aquatiums, water changes etc. I like all API products. Not sure how this differs from API StressCoat except StressCoat costs more and supposedly helps the natural slime coat of freshwater fish. I altetnate both. Trust API brand for my precious fish over "big box store" brands always.

Rated 5 out of 5 stars
By donnie on Nov 19, 2025

Great product

Great product works well

Great product works well

Rated 5 out of 5 stars
By Roxane on May 19, 2025

speed

very speedy delivery and a person who works at an aquarium said it was a great product

very speedy delivery and a person who works at an aquarium said it was a great product

Rated 5 out of 5 stars
By Keira on Dec 1, 2025

Big bottle for valued price

Great price

Great price

Rated 5 out of 5 stars
By Pamela on May 5, 2025

Value

Works great. Much cheaper than buying smaller sizes

Works great. Much cheaper than buying smaller sizes

Rated 5 out of 5 stars
By Hannah on Dec 15, 2024
Top 100 Contributor

Great value!

I love these bigger containers for bigger tanks need larger and frequent water changes.

I love these bigger containers for bigger tanks need larger and frequent water changes.

Rated 5 out of 5 stars
By Kimberly on Apr 9, 2025

The price

Great price for the amount.

Great price for the amount.

Rated 5 out of 5 stars
By William on Dec 2, 2024

Healing

The best way to treat fish injuries without stressing the fish

The best way to treat fish injuries without stressing the fish

Rated 4 out of 5 stars
By Archie on Nov 28, 2024

TAP water condition thumbs up!

A good economical water conditioner that I have used for years.

A good economical water conditioner that I have used for years.