API Stress Coat Aquarium Water Conditioner, 16-oz bottle, bundle of 2 - Chewy.com

API Stress Coat Aquarium Water Conditioner

Rated 4.797 out of 5 stars

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$19.92Chewy Price
$20.96Chewy Price
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About This Item


  • Fast-acting formula conditions tap water for use in freshwater aquariums.
  • Helps reduce chlorine, chloramines and heavy metals that can harm your finned friend.
  • Aloe vera extract helps repair and protect your fish’s slime coat from damage caused by fighting, handling or shipping.
  • Use when adding or changing water, adding a new fish, or when your fish is sick or injured.
  • Each 5-gallon container treats over 7,600 gallons of aquarium 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

Special Note

  • 1-oz bottle treats up to 60 gallons.
  • 8-oz bottle treats up to 470 gallons.
  • 16-oz bottle treats up to 940 gallons.
  • 64-oz bottle treats up to 3786 gallons.
  • 1-gal treats up to 7600 gallons.

Questions & Answers

37 Customer Questions

Is this ok for African dwarf frogs too? I have been using it in my community tank with the frogs in it along with the fish
Answer by ChewyAug 23, 2018
This product is not formulated for amphibians.

When using this product do i still have to use a regular water conditioner or do i use just this ans nothing else?
Answer by ChewyDec 22, 2018
This product removes chlorine and chloramines so no other conditioner is needed. Additionally, it detoxifies heavy metals, reduces fish stress and replaces the slime coat on your fish.

I am barely going to buy this after using a plain water conditioner. Would I have to do a complete water change with API stress coat in order to get the best results for the benefits it offers?
Answer by ChewyFeb 06, 2018
A complete water change would not be necessary if using this product as directed.

Do I use this every day like a typical betta water conditioner, or just after doing water changes?
Answer by ChewyFeb 19, 2018
The conditioner should be used when setting up an aquarium, adding or changing water, when adding a new fish, or when fish are damaged by injury or disease.

ReviewsWrite a Review

Rated 4.797 out of 5 stars
133 Reviews
Would recommend to a friend

133 Customer Reviews

Filter by reviews that mention

Rated 5 out of 5 stars
By thebklynblujay on Feb 12, 2023

a must have product!

I have been an aquarium hobbyist for over 10 years, and this product is an absolute must have! Regular water changes are an important practice for overall health of your fish and aquarium. This product dechlorinates your tap water effectively and helps your fish maintain a healthy slime coat in the process. Safe for your planted aquarium as well, which is also a plus. Happy fishkeeping!

Rated 5 out of 5 stars
By Betty on Jan 23, 2023

PERFECT Smaller Size Stress Coat

Very pleased with this product and have used it for years. Love the tiny size you I can use for smaller amounts of the needed quanities to replace water in my aquarium. Will always be back to get this and you should too.

Rated 5 out of 5 stars
By Kkkk on Dec 20, 2022

Stress coat

Stuff works quick to stabilize water and remove any chlorine or nitrites. Been using for over 5 years

Rated 5 out of 5 stars
By Yuricat on Nov 3, 2022

Aquarium Water Conditioner

this works very well for my 29 gal tank, my big Black Moore fish are doing just great and was a good price.

Rated 5 out of 5 stars
By Judy on Jul 3, 2022

very reliable water conditioner

I have used this product for 10 years in my water feature. I put approximately 1/3 of a cup once a week in what I would guess is around 100 gallons of tap water. I have never lost a fish in all that time except for the one time my cat decided his new hobby was fishing. He was only able to catch 2 out of 15 and one lived through the ordeal. I believe the water conditioner helped to save her.

Rated 5 out of 5 stars
By Squirrel1 on Nov 17, 2022

Works well

Does what it says nice stuff highly recommend will buy again

Rated 5 out of 5 stars
By Sebastian on Sep 16, 2022

Great product

Product works well for fish tank, good brand. I will definitely continue to buy in the future.

Rated 4 out of 5 stars
By sbbb on Jul 1, 2022


sb try this may not regret. asdfawer asdfwerfdadsfasdf

Rated 5 out of 5 stars
By Oldfloster on May 24, 2022


Perfect for my freshwater fish & has the needed conditioner in it for my betta fish.

Rated 5 out of 5 stars
By Chuck on Apr 4, 2022

No stress here

Always my go to. In my opinion better than prime. Been using this so long I buy it by the gallon .