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Fluval Waste Control Biological Cleaner, Aquarium Water Treatment, 8.4 Oz., A8355

Original price was: $11.19.Current price is: $10.63.

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Price: $11.19 - $10.63
(as of Oct 15, 2025 15:02:37 UTC – Details)


Fluval Waste Control Biological Cleaner helps reduce aquarium maintenance by reducing waste in gravel, power filters, decorations and other interior aquarium surfaces. Fluval Biological Cleaner rapidly reduces organic waste from uneaten food, fish waste and other decaying material such as plant leaves. It is especially beneficial for goldfish, cichlids, heavily populated aquariums and other aquariums where greater amounts of fish waste are expected. Fluval Biological Cleaner is suitable for fresh and saltwater tanks.
For more fish tank accessories, check out other Fluval products including aquarium filters, aquarium heaters, aquarium air pumps, aquarium lights, aquarium rocks, aquarium thermometers, and aquarium stands. Fluval has a wide variety of products that are perfect for your pet fish to enjoy in any large fish tank, small fish tank, saltwater tank or freshwater tank. Fluval broke onto the aquatic scene in 1975 by introducing the world’s first 3-stage filter with synchronous motor technology – a breakthrough that is still applied in the industry today. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products that remain at the forefront of technology, and which set the bar in quality, style and functionality. Fluval’s mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come.
Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 2.3 x 2.3 x 6 inches; 11.2 ounces
Item model number ‏ : ‎ A8355A1
Department ‏ : ‎ Unisex-Adult
Date First Available ‏ : ‎ October 2, 2013
Manufacturer ‏ : ‎ Rolf C. Hagen (USA) Corp.
ASIN ‏ : ‎ B00G25IBBW
Best Sellers Rank: #18,185 in Pet Supplies (See Top 100 in Pet Supplies) #154 in Aquarium Water Treatments
Customer Reviews: 4.5 4.5 out of 5 stars 3,074 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });

Care for Your Habitat: All-natural water care reduces organic waste and overall tank maintenance by effectively cleaning interior surfaces. Treats up to 500 gallons of water.
Ideal for New Aquariums: Extremely effective when setting up a new aquarium or introducing new fish to an existing one and useful during water changes and filter media changes, when organic waste is building up.
All-Natural Care: Infused with Bio Scrubbers that breaks down waste and promotes clean water and living conditions.
Proper Care: For best results, use in combination with Fluval Cycle Biological Enhancer to prevent/control potential increases in ammonia and nitrite caused by breakdown of organic matter.
Additional Features: Can be used in both freshwater and saltwater aquariums.

Customers say

Customers find the biological cleaner effective, with one noting it works fast at digesting waste, and many reporting their tanks become crystal clear. The product receives positive feedback for its value, waste control capabilities, and appearance, with one customer mentioning it works well in 5-gallon aquariums. However, opinions are mixed regarding fish safety, with some customers reporting their fish died after use, and there are concerns about nitrate levels.

13 reviews for Fluval Waste Control Biological Cleaner, Aquarium Water Treatment, 8.4 Oz., A8355

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  1. Adeline acevedo

    Good product
    Works well

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  2. C. Brown

    Works as advertised
    Works as advertised.

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  3. kboyzmom

    Better Than Sludge Destroyer
    We used to use Sludge Destroyer for our turtle’s tank. Worked great until it didn’t. Tried this Fluval product. It really keeps the tank clean & the water clear.

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  4. John M

    Long-term use is where this shines
    Original review: Works like any other common biological cleaner. Cleans surfaces and decor, but not under your gravel! I have wasted money and compared many other products and brands in this category, and tbh the ones made for turtles seem to do a better job. Also, if you poke into the gravel while adding these products, it will help disperse it into the gravel. But the product itself does not automatically clean it. I have plants and good filtration to offset the rise in Ammonia, but for others maybe this product shouldn’t be worth the risk. That is my opinion.Update: After a little more experimentation between other brands, it seems like Fluval does a better job clearing up the water column and sludge/algae on decor. If you stir up the gravel by stabbing it lightly with an object or tool while the product is in the water, it will actually help clean gravel muck!

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  5. Taylor Day

    Good fishy water
    Surprisingly worked very well and helped keep my tank looking nice and clear

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  6. Mayensi

    Pescera
    Es el mejor producto que eh comprado para balancear el ph de mi pecera lo amo y lo ordeno cada dos meses

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  7. sunnyk

    Clear water, dying snails
    Used the directed amount in 5 gallon tank and water looks clearer and the live plants look pretty good! But I think it’s killing the snails- 2 days after adding it with a water change, all the snails started heading to the top of the tank and several are now floating. The 3 anchor catfish are also floating with tails up near the bottom instead of sitting on the bottom. The beta seems unfazed. We’ll see what happened in the next couple days…

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  8. Mike

    works as advertised
    Product works as promised helps break down waste . I wish there was a bigger bottle to last longer

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  9. Sony soman pillai

    Best I used so far …. There is no competent

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  10. Terry

    Excellent stuff my water was really really chalky and this stuff cleared it overnight looks crystal clear.

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  11. Lisa Walker

    Always a great fish product

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  12. Lesley M

    Fantastic product. My fish pond, which is a large, deep ceramic pot has never been so clear. Very happy with my purchase.

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  13. bacouillard

    Super produit. Efficace avec peu de liquide

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    Fluval Waste Control Biological Cleaner, Aquarium Water Treatment, 8.4 Oz., A8355
    Fluval Waste Control Biological Cleaner, Aquarium Water Treatment, 8.4 Oz., A8355

    Original price was: $11.19.Current price is: $10.63.

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