











Fluval Cycle Biological Enhancer, Aquarium Water Treatment, 16.9 Oz., A8351
-
FatChupacabras
> 3 dayReally bad that a company that make really good products is so bad in making biological enhnancers (bacteria for the nitrogen cycle).
-
Nora Lopez
> 3 dayNo sirve, no ayuda en nada al agua.
-
Jose Hanquier
> 3 dayThis product did not work at all. I am doing a fishless cycle with 2 ppm ammonia and there has been no change in ammonia, no development of nitrites or nitrates.
-
Beans
05-06-2025Love the measuring cup that comes with is, so I dont over use
-
Sean
> 3 dayWorks
-
Sammimantha Renz
> 3 dayTried 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
-
Joseph C
> 3 dayFluval makes great products !! Works well .
-
Randall
> 3 dayHear me now..., believe me later... you need this now.
-
Walter Ponce
> 3 dayAs soon as you start reading NO2, dose with this. Add your Ammonia readings and your NO2 readings daily and if they equal or are under 1ppm, dose a single dose for your size Aquarium with Seachem Prime, all the way up to 4ppm when added together in which case there would be a quadruple dose of SCPrime.. If Ammonia spikes to 2 ppm just do a 80% water change and add more fluval + SC Prime. If the Ammonia AND NO2 readings when added together equal more than 4 ppm, do a 80% water change and dose with fluval + SCPrime. if NO3 reads more than 40 ppm with no Ammonia or NO2, do a 50% water change but DO NOT ADD MORE FLUVAL. And of course, treat your tap water with SC Prime every time. ONLY add FLUVAL when there is NO@ present. Without NO2 the NO3 this product seems to add will not have anything to eat and will die off. Theres a few great videos on youtube and tutorials in groups. This has worked for me EVERY time so far.
-
Kforti1
> 3 dayUnfortunately this didnt work for us at all. We are trying to cycle a newly setup 55 gal saltwater tank. We used this per the directions everyday for a week (2 bottles worth) without any change in our levels (ammonia stuck at 4.0). However after one treatment of the 8.45 oz bottle of Instant Ocean Bio-Spira, I have ammonia level down to 1.0 tested 24 hours after treatment! Hoping this one does the trick!