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

Ok I know how the nitrogen cycle works but this stuff makes it really hard to know the progression of your cycle. I have been trying to cycle a tank for over a month with nothing to show for it . I have had been constantly reading .5 ppm of ammonia, 0 nitrites and 0 nitrates, with a handful of fish ( been using prime to keep the fish health dont worry) . So I decided to try help the cycle along and buy a bottle of this stuff. 24 hours after the first does, I tested again .5 ppm ammonia, 0 nitrites, and 5 ppm nitrates, I was like wow this is way too fast to have nitrates and made no sense that I still have 0 nitrites. Tested after 2nd day dosing. almost same thing .5 ppm, 0 nitrites, and maybe 7or8 ppm nitrates. Still didnt make sense. Cant get nitrates without nitrites and have never registered even the slightest amount of nitrite in my tank since day 1. So it got me thinking that the nitrates must be coming from the bottle of Fluval. I took about 10 drops of it and mixed it in about 50 mls of fresh tap water which I tested first and was nitrate free. When I tested this mixture, it took all of about 30 seconds for the nitrate test to go off the scale. So my nitrate reading in my tank is really from adding this stuff. That makes it difficult to follow the progress of my cycle when I am introducing nitrates into my tank.

Recommended. Great for any new tank to set up the cycling.

Exactly what it was advertised to be. Works great! My fish are happy, and so am I.

Much cheaper than buying small bottles. Helped clear up the Koi pond.

great

GOOD

After using this product All 25 fish in my tank died. My tank had been established for 18 months. I did a 25 % water change, added this product with some water conditioner and all my fish died over a period of 3-4 days. Most of my fish had been in the tank for well over a year and were doing fine. I trusted information I obtained over the internet which included the use of this product. I had a beautiful 75 gallon tank with lots of happy fish. My tank is void of fish now. I will take a break from the fish tank for now, regroup and re start and establish the tank with new fish after I recover from the grief of losing all my fish.

Awesome product!!

Works as described, essential bacteria controls ammonia in fish tank. Add every water change. I would like to know what bacteria species are being used?

it works pretty well to keep the ammonia down. But Im not sure it has any lasting effects. You would have to keep using it long term and my understanding was it was suppose to help my beneficial bacteria grow.