unhappy

With some of my recent tank purchases (and some upcoming trades to the fish store) my 90 gallon tank will be empty. It is a standard 48" × 18" × 24". My water is 7.4 pm and around 110 ppm hardness, so I have plenty of options. I am also willing to harden the water with lake salts if needed for...

Hey all!    So within the last two days, I've noticed patches of bubbles on the surface of the water in my tank, kind of like when you use pima fix and it froths up the surface, but a little less severe than that. Also, when I watch my fish, they seem to be breathing more rapidly than usual...