API Accu-Clear Freshwater Aquarium Clarifier, 4-fl oz bottle

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About This Item

Details

  • 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.

Instructions

FAQ

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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Questions & Answers

22 Customer Questions

Is API Accu-clear freshwater aquarium clarifier safe for cherry shrimp?

Answer by Chewy • Feb 13, 2022
The Accu-Clear can be used in tanks containing cherry shrimp.

Will this product clear up cloudy water caused by bacterial bloom?

Answer by Chewy • Dec 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 this safe for African Dwarf Frogs and snails?

Answer by Chewy • Sep 08, 2020
This Aquarium Clarifier is safe for snails and frogs.

Should the fish be removed when using this or can I use it while they are in their home?

Answer by Chewy • Mar 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.
Reviews
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4.5
Rated 4.5 out of 5 stars
297 Ratings
Terms & Conditions

110 Customer Reviews

Rated 1 out of 5 stars
By Nicole on Sep 20, 2025
Top 500 Contributor

Water clarifier

I think this product would work better for ponds, it can add fluffy material to your tank. I should have known better because it's an API product. I used one of

I think this product would work better for ponds, it can add fluffy material to your tank. I should have known better because it's an API product. I used one of their pill medications one time to treat my goldfish tank and killed everything in my 40 gallon. I was devastated.

Rated 5 out of 5 stars
By Jennifer on Aug 5, 2025

Great product!

This aquarium clarifier works very well. My aquarium was so cloudy after treating my fish for fungal infection and not being able to have the carbon filter in

This aquarium clarifier works very well. My aquarium was so cloudy after treating my fish for fungal infection and not being able to have the carbon filter in. Once I was done treating the fungal infection, the carbon filter and water change was still not enough to clear up the water. I’m impressed with how well this product solved that problem so quickly.

Rated 1 out of 5 stars
By Juan on Sep 23, 2025

Doesn’t do the job

Not only it doesn’t work, but it lower the Ph on my tank. I was honestly expecting it to be good because I trust this brand, needless to say, is not good at all

Not only it doesn’t work, but it lower the Ph on my tank. I was honestly expecting it to be good because I trust this brand, needless to say, is not good at all.

Rated 5 out of 5 stars
By Delwin on Aug 9, 2025

Works Great!

My aquarium clouds up everytime I do a partial change. Accuclear really hastens the amount of time it takes to clear up. Ive had a couple of friends who also have

My aquarium clouds up everytime I do a partial change. Accuclear really hastens the amount of time it takes to clear up. Ive had a couple of friends who also have aquariums ask how I keep the water so crystal clear.

Rated 2 out of 5 stars
By Jessi on Nov 8, 2025

Did not work

No results after multiple uses. No harm to the animals though

No results after multiple uses. No harm to the animals though

Rated 5 out of 5 stars
By DAVID on Sep 15, 2025

Freshwater Aquarium Clarifier

Using it for years. ALways works and this store had a better price and faster delivery

Using it for years. ALways works and this store had a better price and faster delivery

Rated 5 out of 5 stars
By kathy on Jul 4, 2025

Does what it says

If you have milky looking water, try this. It binds the fine particles together so they can be cleared away through the intake. You will see a huge difference

If you have milky looking water, try this. It binds the fine particles together so they can be cleared away through the intake. You will see a huge difference in just a few days.

Rated 5 out of 5 stars
By Christopher on Aug 27, 2025

API freshwater tank clarifier

This stuff works great. It consistently works and keeps my tank crystal clear.

This stuff works great. It consistently works and keeps my tank crystal clear.

Rated 5 out of 5 stars
By Maya on Jun 28, 2025

Replacement

Upon arrival the seal was broken. Talked to customer service through Chat and they sent me a new one within 48hrs. Best service ever

Upon arrival the seal was broken. Talked to customer service through Chat and they sent me a new one within 48hrs. Best service ever

Rated 5 out of 5 stars
By Marshall on Dec 22, 2025

Everything I have ever ordered from Chewy has been top-notch!

IT DOES THE JOB GREAT!

IT DOES THE JOB GREAT!