It takes time to for the bacteria to grow, although it does cycle good.

Only takes a little and works great. No clouding water.

I had an unfortunate heater malfunction (over heating) that sent my 5 year established reef bacteria on the fritz. After seeing no impact on my ammonia, I saw an enormous spike about a week after the crash in my Nitrites, so bad they were off the reader chart > 50ppm, and I was starting to lose corals within one week I believe this product assisted getting my Nitrites back down to normal (0ppm) and minimized tank loss (saved included a crocea clam, clowns/damsels, sea hare, snails and zoanthids and mushrooms) I wished I'd put this in immediately after I got my tank water changed from the incident maybe it would've saved my sps corals. This in combined with Special blend seem to be excellent products in establishing the bacteria needed for your fishtank. Recommended for people trying to cycle their tanks.