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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Reviews
  • Shirley L. Carson

    > 3 day

    I ordered this product in April 2021 and had to have it replaced because it expired in 2020. The second, replacement bottle, also came as expired.

  • rr

    > 3 day

    This is amazing. I bought other products to cycle my tank and was never successful in doing so. I used products such as special blend and more extreme nitifying bacteria products and was never successful. I was doing constant testing of my freshwater tank to see when is the final date for my tank nitrogen cycle, and after a month still had no success with the previous products. I bought this product and within two days my tank started the cycle. Its now been a month and my tank is great. I strongly recommend this product. Fluval is the greatest.

  • DONALD MATCHETT

    Greater than one week

    NOT AS GOOD AS SOME OTHERS

  • J. Gallo

    08-06-2025

    The product might be good normally. But currently, March 2016, they are shipping a product that is almost two years past its expiration date.

  • James Maddocks

    Greater than one week

    This product like most others of this type does not speed the cycle process up at all in my experiance . I have been in hobby for 30+ years and set many tanks up in that time .nothing but time has worked for me

  • David

    > 3 day

    GOOD

  • Ms. Bethel Abbott II

    Greater than one week

    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.

  • Sean

    > 3 day

    Impressed with the quickness of ridding new tank syndrome, not a single loss after 3 days.

  • robert dumire

    > 3 day

    I use this on all my aquariums

  • Steven

    05-06-2025

    Bought two bottles and empty them both into my sump for my 125 gal. A month and a half later, ammonia is still reading at 4 ppm.

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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