API Accu-Clear Freshwater Aquarium Clarifier

Rated 4.0702 out of 5 stars
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About This Item

  • Formulated to clear cloudy or green water within several hours.
  • Clumps tiny particles together for easy filter removal.
  • Safe solution for freshwater fish and plants.
  • Just use once a week as part of routine maintenance.
  • The tan, translucent liquid is completely odorless for your convenience.
Play Video: Learn More About API From Our Team of Experts
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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Fish TypeTropical Freshwater, Betta, Cichlid, Goldfish, Bottom FeederTropical FreshwaterTropical FreshwaterTropical FreshwaterTropical Freshwater
Aquarium TypeFreshwaterFreshwaterFreshwaterFreshwaterFreshwater
Top IngredientsDeionized Water, Aluminum Chlorohydrate, Polyelectrolytes.

Questions & Answers

21 Customer Questions

Will this product clear up cloudy water caused by bacterial bloom?
Answer by ChewyDec 03, 2020
API ACCU-CLEAR will help to clear the cloudiness caused by bacterial blooms, but does not address the underlying cause. As a result, the cloudiness will come back quickly unless the main cause of bacterial blooms is treated.

Is API Accu-clear freshwater aquarium clarifier safe for cherry shrimp?
Answer by ChewyFeb 13, 2022
The Accu-Clear can be used in tanks containing cherry shrimp.

Should the fish be removed when using this or can I use it while they are in their home?
Answer by ChewyMar 08, 2021
API Accu-Clear Freshwater Aquarium Clarifier is specifically formulated for use in freshwater ponds. You can put it directly into the pond without removing the fish.

Is this good for goldfish tank ?
Answer by ChewyJul 30, 2019
This solution is safe for all freshwater fish and plants.

ReviewsWrite a Review

Rated 4.0702 out of 5 stars
57 Reviews
Would recommend to a friend

57 Customer Reviews

Rated 1 out of 5 stars
By whatshername on Jul 23, 2022

rating accu-clear water cleaner

This did not do a thing. I am having trouble getting my water clear again. I think it may be my filters. I changed my whole house filter system, hoping that will clear it up. It has been so clear for several years then it just got cloudy. I have been using the API goldfish aquarium cleaner for years and it worked.

Rated 1 out of 5 stars
By Vinny on Sep 10, 2022


DO NOT by this as it will not only make your water even more cloudy but it'll turn blue and you won't be able to see through your aquarium.

Rated 5 out of 5 stars
By Pisces on Aug 22, 2022

Accu Clear

I changed the water twice but it turned cloudy again overnight each time. I purchased this product and it worked within 1 day.

Rated 1 out of 5 stars
By Robert on Jul 17, 2022

made my water worst

I added one cap full of the bottle and it instantly got more cloudy I thought it might clear up by today but hasn’t. Very disappointed

Rated 5 out of 5 stars
By Nana on Jun 30, 2022

larger item

This too was larger than I have ordered in the past and didn't realize it. I am so pleased that I did. It is well worth it.

Rated 5 out of 5 stars
By HeaCF51 on Jan 24, 2022

Awesome Product

This is an excellent water clarifier! It truly works! It cleared up my son's fish tank within an hour & the tank was pretty cloudy. I usually use another popular brand to clear the tank, but I saw the reviews for API Accu Clear Freshwater Aquarium Clarifier & decided to give it a try,& it's a great product in a small bottle!

Rated 1 out of 5 stars
By Mickie9119 on May 2, 2022

Made my water worse

This didn't clear my water, it actually made my water cloudy

Rated 5 out of 5 stars
By timmy on Aug 27, 2021

the product does what it says it will do

I was at first a little skeptical about using this but decided to go ahead and given it a try. Put 5 ml of it in my 50 gallon aquarium and waited to see what it does. Almost right away the water turned very cloudy but after a short period of time you could see the water beginning to clear up. After about 8 hours my tank was crystal clear

Rated 5 out of 5 stars
By Sensier on Nov 20, 2021

Clear water

The turtle tank is so clear, I recommend everyone get this and add it with stress zyme and sludge destroyer

Rated 1 out of 5 stars
By Sparkles0704 on Sep 2, 2021

Not the best

Did not work as description stated. It was added to the tank and the fish were acting fun. Also, it made the water clouded. Don't recommend.