API Goldfish Protect Aquarium Water Conditioner, 4-oz bottle

Rated 3 out of 5 stars
$4.28Chewy Price
$5.98Chewy Price
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About This Item


  • Supports safe tap water, working to protect your goldfish from harmful ammonia.
  • Helps to remove chlorine and chloramines from tap water.
  • The removal of toxic chemicals may keep your finned friends safe from reactions and health problems often caused by tap water.
  • Adds a protective slime coat to your tank, full of health-boosting minerals to help support the overall health of your fish.
  • Ideal during start-up and as part of your regular maintenance—whenever you fill your tank with fresh 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

4-oz bottle treats up to 47 gallons.
Help give your goldfish a clean home with API's Goldfish Aquarium Cleaner.

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 TypeGoldfishGoldfishBetta, Bottom Feeder, Cichlid...GoldfishBetta, Bottom Feeder, Cichlid...
Aquarium TypeFreshwater, PondFreshwater, PondSaltwater, FreshwaterFreshwater, PondSaltwater, Freshwater

Questions & Answers

2 Customer Questions

Do it help with cloudy water ?
Answer by ChewyMar 26, 2021
Water exchanges will always help to remove some cloudiness, so a water exchange using the Goldfish Protect would be appropriate. Cloudiness can be caused by high ammonia, so it is recommended also using API Quick Start to boost the bacterial filtration in the aquarium to remove ammonia to keep the fish healthy and the aquarium clear.

Does this help with ph gg and kh levels
Answer by ChewyMar 07, 2021
API Tap Water Conditioner does not alter pH, KH or GH of the water.

ReviewsWrite a Review

Rated 3 out of 5 stars
2 Ratings
Would recommend to a friend

2 Customer Reviews

Rated 5 out of 5 stars
By whatshername on Apr 10, 2022

works great

I use this with the Api aquarium cleaner and my 75-gallon Goldfish tank is crystal clear. I have used this combo for years.

Rated 1 out of 5 stars
By flasunshine on Nov 18, 2016

it killed my fishes

i had 8 different fish and i put exact amount in my tank and 2 days later they all died my kids cryed we had my fishes for 4 yrs with no problem till i brought this stuff never again..