API Stress Zyme Freshwater & Saltwater Aquarium Water Cleaner

By API
Rated 4.8723 out of 5 stars
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API Stress Zyme Freshwater & Saltwater Aquarium Water Cleaner, 16-oz bottle slide 1 of 8
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API Stress Zyme Freshwater & Saltwater Aquarium Water Cleaner, 16-oz bottle slide 1 of 8
Size
$8.08Chewy Price
List:
$20.99Chewy Price
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$12.91
(62%)
$7.68Autoship Price
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Frequently Bought Together

Frequently Bought Together
Rated 4.8723 out of 5 stars
47
$8.08Chewy Price
Frequently Bought Together
Rated 4.8519 out of 5 stars
54
$10.99Chewy Price
Frequently Bought Together
Rated 4.05 out of 5 stars
60
$15.59Chewy Price
Total Price: $0.00

About This Item

  • Keeps aquarium clean by reducing aquarium maintenance.
  • Contains over 300 million live bacteria per teaspoonful to consume sludge and organic debris, keeping gravel and glass clean naturally.
  • Use it weekly in fresh and saltwater aquariums to maintain a strong biological filter and a healthy, clean aquarium.
  • All natural formula adds beneficial bacteria for a healthier aquarium.
  • Helps boost the natural aquarium cycle.
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Learn More About API From Our Team of Experts

Special Note

  • 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.

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Customer Rating
Rated 4.8723 out of 5 stars
47
Rated 4.2593 out of 5 stars
27
Rated 4.8607 out of 5 stars
122
—
Rated 5 out of 5 stars
6
Price
$8.08Chewy Price
$9.26Chewy Price
$9.59Chewy Price
$8.49Chewy Price
$14.89Chewy Price
Autoship
$7.68Chewy Price
$8.80Chewy Price
$9.11Chewy Price
$8.07Chewy Price
$14.15Chewy Price
Fish TypeTropical Freshwater, Betta, Cichlid...Tropical Freshwater, Betta, Cichlid...Tropical Freshwater, Betta, Cichlid...Marine Fish, Marine InvertebrateTropical Freshwater, Marine Fish, Betta...
Aquarium TypeFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, SaltwaterSaltwaterFreshwater, Saltwater

Questions & Answers

18 Customer Questions

Can I use Quick start & Stress zyme at the same time
Answer by Chewy • Apr 08, 2018
API products can be combined together to help clean and calm the fish.
Do you put this in while the fish is in the tank? Or take them or and do it and then return after specific amount of time?
Answer by Chewy • Mar 30, 2018
This water conditioner can be added while the fish are in the tank.
Do any of your larger bottle sizes (64oz/1gal) include a pump?
Answer by Chewy • Oct 24, 2017
These bottles don't included a pump.
Can it be used safely with catfish and other bottom feeders?
Answer by Chewy • Jan 13, 2018
This product is safe to use with catfish and bottom feeders.

ReviewsWrite a Review

4.9
Rated 4.8723 out of 5 stars
47 Reviews
100%
Would recommend to a friend
1
2.1277
2%
2
0
0%
3
0
0%
4
4.2553
4%
5
93.617
94%

47 Customer Reviews

Rated 5 out of 5 stars
By gcj000 on May 20, 2022

Good Stuff !

I use API Stress Zyme to start new tanks and every time I do water changes. It really does prevent serious nitrate and ammonia problems in new tanks when used as directed.

Rated 5 out of 5 stars
By rhianna on May 21, 2022

best price ever

smaller sizes in stores cost more! wonderful product aswell, really helps with the gunk under the sand

Rated 5 out of 5 stars
By Leece on Feb 20, 2022

Great Product for Aquariums

This Stress Zyme was delivered quickly to my front door. I was so glad because i ran out unexpectedly. Thankyou Chewy!

Rated 5 out of 5 stars
By Rebeljim on Jul 28, 2021

Great Product!

I use API Stress Zyme Freshwater in all of my 4 tanks after water changes! It helps maintain the good bacteria levels so the water remains clear. I highly recommend this product.

Rated 5 out of 5 stars
By Maintenance on Sep 6, 2021

Stress Zyme

Great product.! I use it for starting a new aquarium. Chewy delivered quickly.

Rated 5 out of 5 stars
By PetsRgreat on May 26, 2021
Top 250 Contributor

works great

I use this once a week and it works great. Keeps water clear. Waste in gravel is broken down and waste in filter and medium is kept to a minimal.

Rated 5 out of 5 stars
By midgie on Feb 8, 2021

Great stuff

Tried and true, as long as your properly cycle your tanks and just use this as a boost everything is great. I use it regularly and in the place of their quick start product (when setting up a new tank). Give it a try, it can't hurt!

Rated 5 out of 5 stars
By Georgiaoutlaw on Feb 17, 2021

Good product

Working so far my fish are still alive they are swimming and eating as normal as I think they should

Rated 5 out of 5 stars
By Mark on Feb 14, 2021

Stresszyme

Works good, keeps fish alive, tank stays cleaner, all around good product.

Rated 5 out of 5 stars
By Liz2981 on Oct 19, 2020

Great addition to tank maintenance

I have several fish tanks that I take care of at my workplace and this has been a great addition to regular tank maintenance. If the tank is looking a little dirty, I just put some of this in there and it clears up the sludge.