Top critical review
since it was recommended on fish care sites
on August 24, 2015
So I had an emergency with the Nitrogen Cycle and had to change the water every few hours to keep the ammonia down. It did nothing for the ammonia, but I didn't expect it to (Turns out the cheaper Prime does though). My real complaint is that it filled my tank with the "protective slime" utterly gross. Made it harder to see the fish, coated the aquarium, and clogged the filter in a matter of DAYS. Admittedly it was used more than it was designed for. I am switching to Prime, since it was recommended on fish care sites, but I haven't tried it myself.