Customer Reviews

Rating: 4.6 of 5 stars 14 Reviews 14 Reviews 4.6 out of 5 Stars

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93% Recommend

93% of reviewersrecommend this product

Rating: 4.6 of 5 stars 4.6 / 5

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Fluval Cycle Biological Booster Water Conditioner

Fluval Cycle Biological Booster Water Conditioner

  • Most Helpful Positive Review

    Read All 13 Positive Reviews

    Makes tank fish friendly

    By Fishmom on Apr 13, 2021

    Love this product! I take my tank completely apart every two weeks for a thorough cleaning. After adding this product I can pop my goldfish right back immediately. Chet’s a 5 year old goldfish healthy & happy!

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  • Most Helpful Critical Review

    Waste of money

    By AxolotlQueen on Aug 4, 2018

    I have now bought 2 bottles of this, after reading such positive reviews. Neither bottle worked. No cycle established. Had to remove my Axolotls from their big tank to cycle the old fashioned way. Thought the first bottle might have been a dud, but had no results with the second bottle, either.

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14 Reviews

Showing 1-10 of 14 Reviews

  • 5 out of 5 stars

    Makes tank fish friendly

    By on

    Love this product! I take my tank completely apart every two weeks for a thorough cleaning. After adding this product I can pop my goldfish right back immediately. Chet’s a 5 year old goldfish healthy & happy!

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  • 5 out of 5 stars

    Great Product!

    By on

    I have seen videos on youtube where people use this product for cycling a new tank fast. I have 3 fish tanks but all are already cycled. I used it for maintenance purposes and 1 day after using this in my 55 gallon tank I noticed the glass was cleaner. I use sponge filters so my water is always fairly clear. With Fluval cycle, my water is 100% clear. It looks like my fish are swimming in air, lol!

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  • 5 out of 5 stars

    Finally something worked!

    By on

    We have struggled for almost two months when my daughter got her goldfish. The tank water would get nasty after 24 hours, and I mean nasty. We had filters, oxygen, water treatments of every possible sort. The last thing to try was to treat the fish and not the water-enter this product! It’s been two weeks and the tank is clear, Tuna seems calmer (no flirting around spastically). Yay!

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  • 4 out of 5 stars

    Unbeatable price

    By on

    Purchased it for the price and recommendation. I believe it work since gold fish is still doing great after adding this the first day.

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  • 5 out of 5 stars

    Fluval makes the best products!

    By on

    If you own an aquarium, you need this product. It helps get the bacterial chemistry in your tank right. Great for adding fish, water changes and setting up new tanks. Worth the money.

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  • 1 out of 5 stars

    Waste of money

    By on

    I have now bought 2 bottles of this, after reading such positive reviews. Neither bottle worked. No cycle established. Had to remove my Axolotls from their big tank to cycle the old fashioned way. Thought the first bottle might have been a dud, but had no results with the second bottle, either.

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  • 5 out of 5 stars

    Great Product From Fluval

    By on

    I have been using this for almost 2 years and I love it!

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  • 5 out of 5 stars

    Successful cycle

    By on

    This product assisted me to reinitiate a cycle in my tank after cycle was halted by huge drop in PH by my water district.

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  • 5 out of 5 stars

    Great stuff

    By on

    Worked well in tank. Others leave a film but this one doesn't.

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  • 5 out of 5 stars

    Best bacterial additive

    By on top500Contributor

    Have used this in all 5 of my tanks & Koi pond, helps in keeping the toxins in check with the bacteria booster for ammonia & nitrites, safe for Freshwater or Saltwater.

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