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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
273
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38
Reviews

  • Gaston Turcotte

    > 3 day

    Excellent product

  • Diego Rodriguez

    10-06-2025

    I am using it on my saltwater set up. Clear instructions and good value for the money. Most likely I will buy again.

  • Gabriella Legros DDS

    > 3 day

    I used it to discernible or noticeable effect.

  • Honest

    > 3 day

    I’m giving 3 stars because I just don’t know. This did nothing for our 4 tanks.

  • Jay Spain

    > 3 day

    Thanks, saved my fish after I cleaned our my sump and Messed up my beneficial bacteria

  • Mike

    Greater than one week

    Worked as described

  • Kevin Rohm

    > 3 day

    Was delivered frozen solid. Can’t even use it. Pretty sure it’s useless now. Unless I want to cycle my toilet bowl.

  • Nick

    > 3 day

    Gave me a allergic reaction. Also did not work will

  • Sara Badders

    > 3 day

    Best treatment for fish tanks. I used this to start my saltwater tanks cycle. I was able to add fish three weeks after. I haven’t lost any fish since staying to use this product. I use it in all 5 tanks I have for weekly maintenance. Highly recommend

  • Prof. Heaven Daniel

    > 3 day

    I love it, great seller, great item, highly recommended

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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