API Aquarium Water Conditioner & Tropical Fish Food Kit

Rated 5 out of 5 stars
$29.98Chewy Price
$41.98Chewy Price
$28.48Autoship Price
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This Item – API Stress Coat Aquarium Water Conditioner, 16-oz bottle
Rated 4.7737 out of 5 stars
$10.48Chewy Price

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API Stress Zyme Freshwater & Saltwater Aquarium Water Cleaner, 16-oz bottle
Rated 4.8846 out of 5 stars
$15.98Chewy Price

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API Flakes Tropical Fish Food, 5.7-oz bottle
Rated 3.8 out of 5 stars
$13.99Chewy Price

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Total Price: $40.45

About This Item


  • Aquarium starter kit includes everything you need to get started in aquarium care and fishkeeping including water treatment, cleaner and food.
  • With aloe-infused Stress Coat to make tap water fish-safe by removing chlorine, ammonia and chloramines, and detoxifying heavy metals.
  • Includes Stress Zyme to keep water, gravel and decor clean with all-natural, beneficial bacteria that consume sludge.
  • Also includes food for a complete and balanced diet ideal for all types of tropical fish including tetras, angelfish, discus, barbs, guppies and others.
  • Great for beginners and saves time and money by combining many aquarium solutions into one.

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Related Items

The products in this kit are also available individually, for replacement as needed:

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 TypeTropical FreshwaterBetta, Bottom Feeder, Cichlid...Marine Fish, Marine InvertebrateMarine Fish, Marine InvertebrateBottom Feeder, Discus, Goldfish, Marine Invertebrate
Aquarium TypeFreshwaterSaltwater, FreshwaterSaltwaterSaltwaterSaltwater, Freshwater, Pond

Questions & Answers

2 Customer Questions

will this work for a Betta fish?

Will this clear cloudy water
Answer by ChewyApr 01, 2019
The API Stress Zyme Aquarium Water Conditioner helps keep your tank clear by consuming waste, sludge and uneaten food that can cause toxic junk, like ammonia and nitrite.

ReviewsWrite a Review

Rated 5 out of 5 stars
4 Ratings
Would recommend to a friend

4 Customer Reviews

Rated 5 out of 5 stars
By Turtlestuff on Mar 30, 2023

Cheap chemicals you need!

Bundle! Best way to get chemicals you need, cheaper and fadt delivery!

Rated 5 out of 5 stars
By kyrahill on Feb 28, 2021

Great Products!

We have a 29 gallon tank and use stress zyme and stress coat for water changes/maintenance. For over a year we’ve been using it, and it does the trick!

Rated 5 out of 5 stars
By Oona on Feb 16, 2020

I trust this brand with my fish!

I have used these for years. I recently tried a different product and had a lot of issues with my tanks. I am back to what I know works!

Rated 5 out of 5 stars
By Newbee on Mar 4, 2018

Great deal!

My fish love the food. This package provides a big savings. I love the attached measurements.