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API

API ACCU-CLEAR Freshwater Aquarium Water Clarifier 8-Ounce Bottle

  • Based on 20,174 reviews
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Availability: In Stock.
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Arrives Thursday, Aug 20
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Size: 8-Ounce


Pattern Name: Water Clarifier


Features

  • Contains one (1) API ACCU-CLEAR Freshwater Aquarium Water Clarifier 8-Ounce Bottle
  • Clears cloudy aquarium water
  • Clumps floating particles into large clusters that can be easily removed by an aquarium filter
  • Works fast and maximizes filter efficiency
  • Use weekly and when cloudy water is observed in freshwater aquariums only

Description

Clear up green or cloudy water caused by gravel and other floating particles in your freshwater aquarium quickly and safely with API ACCU-CLEAR Freshwater Aquarium Water Clarifier. This liquid clarifier combines tiny particles together to form larger clumps so they can settle at the bottom or be removed by your aquarium filter. API ACCU-CLEAR Water Clarifier quickly eliminates cloudy aquarium water caused by floating particles; water will clear within several hours once it is dosed. If cloudiness persists, another dose can be applied after twenty-four hours. Doses can also be administered weekly as part of your routine maintenance. API ACCU-CLEAR Water Clarifier also improves the overall efficiency of your aquarium filter. With API aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too.

Brand: API


Liquid Volume: 237 ml


Item Weight: 10.08 ounces


Item Form: Liquid


Number of Packs: 1


Language ‏ : ‎ English


Product Dimensions ‏ : ‎ 2 x 2 x 7.5 inches; 10 ounces


Manufacturer recommended age ‏ : ‎ 1 month and up


Item model number ‏ : ‎ 111C


Date First Available ‏ : ‎ October 15, 2006


Manufacturer ‏ : ‎ Mars Fishcare


Best Sellers Rank: #1,604 in Pet Supplies (See Top 100 in Pet Supplies) #4 in Aquarium Water Treatments


#4 in Aquarium Water Treatments:


Customer Reviews: 4.6 4.6 out of 5 stars (20,174)


Brand Name: API


Unit Count: 8 Fluid Ounces


Manufacturer: Mars Fishcare


UPC: 317163031117


Global Trade Identification Number: 17


Included Components: 1 Bottle 8-Ounce


Item Type Name: Aquarium Water Clarifier


Model Number: 111C


Manufacturer Part Number: 111C


Liquid Volume: 237 ml


Item Weight: 10.08 ounces


Item Form: Liquid


Pet Type: Fish


Target Species: Fish


Allergen Information: Apple Free


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Aug 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Clear water immediately
Size: 4-Ounce Pattern Name: Water Clarifier
Excellent product. It took a few minutes to start seeing results. I definitely recommend this product.
Reviewed in the United States on July 19, 2026 by Elinette Robles

  • Buy it, It WORKS, from an amateur
Size: 8-Ounce Pattern Name: Water Clarifier
I’m new to the fish tank world. I was gifted this 30gal tank, I slowly purchase accessories, decorative item. Got the water tested after 3 week for free at local store. Water became cloudy and dark, because I was constantly moving decor around and removing some fish. These guys are fast and elusive. Anyway, I thought I needed to change out the water. I purchase this ACCU-Clear, I follow the instructions 2ml to every 10gal of water. So, I measure out 6mil. The measuring cap show 5 and 10ml, went a little over 5. Reading the reviews, I was expecting dead fishes in the morning. 1st dose show some improvement after 24hrs. I added 6mil the next day, getting better, 3rd day another 6mil. Now the tank is crystal clear and the fishes are still alive and all over the place. Now, someone offer me a 50gal, I wait until at least 6 months, before I even start to think about upgrading. I would definitely recommend this, go slow and follow instructions, wait 24hrs, before u treat the again. This thing WORKS, for this amateur. ... show more
Reviewed in the United States on November 23, 2025 by One Love Homecare

  • Works great!
Size: 8-Ounce Pattern Name: Water Clarifier
Works great for keeping my aquarium water clear and fresh. It helps reduce cloudiness quickly and is easy to use. A simple and effective product for maintaining a clean-looking tank.
Reviewed in the United States on July 11, 2026 by ✨KokoFinds✨

  • Seems to be working (Slowey) :)
Size: 4-Ounce Pattern Name: Water Clarifier
Seems to work ok at best, 3 days in and a slight improvement, So I'm Thinking will work ,Check your fish/tank/sand/and plants. I would say Yes:)
Reviewed in the United States on May 25, 2026 by Amazon Customer

  • I Am Hooked
Size: 8-Ounce Pattern Name: Water Clarifier
THE BEST PRODUCT OF ITS TYPE. WHERE HAVE YOU BEEN ALL MY AQUARIUMS LIFE. Finally a product that actually works. 55 gallon tank. Two cap fulls. Clearest my water has EVER appeared. Matter of a few hours. Overnight wake up to almost transparent glass. Peace of mind and easy on the eyes.
Reviewed in the United States on June 28, 2026 by ScamperingScot

  • Worked great for me
Size: 4-Ounce Pattern Name: Water Clarifier
My 20 gallon has been cloudy for months. I couldn't figure out why. The water tested well. I finally bought this stuff and the following day after one dose the aquarium is crystal clear. Maybe the clearest I've ever seen it. Thumbs up.
Reviewed in the United States on July 6, 2026 by Edward P. Bracewell

  • Worked fast on cloudy aquarium water
Size: 4-Ounce Pattern Name: Water Clarifier
This water clarifier worked much faster than I expected. My freshwater tank had become pretty cloudy, and within just a few hours I could already see a noticeable improvement in the water clarity. By the next day, the tank looked dramatically better. The bottle was easy to dose and I didn’t notice any negative reactions from my fish while using it. It’s a great product to keep on hand for unexpected cloudiness or after disturbing substrate and decor during tank maintenance. ... show more
Reviewed in the United States on May 20, 2026 by Kisha Reinmiller

  • Meh
Size: 8-Ounce Pattern Name: Water Clarifier
Works somewhat okay, if you have an open top tank and it's within 10 to 15 ft of an air doctor going to get dust particles that this will not catch
Reviewed in the United States on February 5, 2026 by Spencer

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