Does anyone know if this tuff works? I used it yesterday on my 55g and have 0 accross the board on my water test. Its my 3rd day cycling with a 3' arowana, 2' blood parrot, 1 1/2' blue jack dempsey, and 3' pleco. I was recommended this stuff at the lfs after making the mistake of putting the fish in after 48 hours, as told by the shop that I purchased everthiing. I already know my tank is too small for the long run, especially for the arowana, I plan on upgrading in about a year or less. Any feedback would be apreciatted. Thanks.