Fluval Cycle Biological Enhancer, Aquarium Water Treatment, 16.9 Oz., A8351

(681 Reviews)

Price
$16.78

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Quantity
(50000 available )

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370 Ratings
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38
Reviews
  • Osbaldo Henderson

    10-06-2025

    It not only is boosting my tanks bacteria, but even helped with a bacteria bloom.

  • steven caudill

    > 3 day

    it works ok but I havent had the effects like I get with dr tims or ATM colony

  • Leonardo M Venancio

    Greater than one week

    Great product already used for years, very good and reliable

  • Ms. Bethel Abbott II

    > 3 day

    I use this product every time I do a water change, the results are good and I am able to keep my tank cycled even without a fish load.

  • Sammimantha Renz

    > 3 day

    Tried it out on a brand new tank and additionally into a existing tank, I have been having wonderful water quality since then in both tanks. I would recommend a activated carbon filter with this product to take full advantage of the colony

  • john ujvary

    Greater than one week

    Works great and great price for the 16 oz

  • Underdog Aquatics

    > 3 day

    I didn’t do a technical test but I set up a lot of aquariums with fish in and sterile-start. I was impressed that shortly later I had an overstocked tank, no casualties, and no nitrogen.

  • Chug love

    > 3 day

    Very small not worth it

  • nopporn

    > 3 day

    Good

  • Jean

    > 3 day

    Cycled my tank in a matter if three days! All my Ammonia , nitrite , and nitrate. Were all at 0ppm! This is a nitrifying bacteria (helps kill Ammonia Nitrite and Nitrate) . This is NOT BENEFICIAL. If you want Beneficial (helps clean sludge in filter and tank) get fluval waste control.

Fluval Cycle Biological Enhancer is a responsive biological aquarium supplement that ensures that all aquariums are immediately inoculated with a powerful team of beneficial bacteria, providing a safe biological habitat for your fish. These highly effective micro-organisms will create a biological flora that quickly metabolizes lethal ammonia and nitrite and allow for the immediate introduction of fish. Fluval Biological Enhancer goes to work fast, releasing massive amounts of beneficial bacteria that eliminate toxic ammonia and nitrite to establish a biologically-balanced aquarium. Fluval Biological Enhancer is strongly recommended for new aquarium set-ups and regular application will help to exclude the establishment of undesirable bacteria in aquariums.

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.

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