Hey guys have a question. I just started using a qt tank after years of going through ich, fungus and other assorted ailments,what i wanted to know is how do you maintain the water quality. If your using meds to treat sick fish it usually kills off the good bacteria and ammo. and nitrite levels start to rise. I had a 10 gal tank with two qt fish in it and could not seem to keep the ammo. down with just water changes. Thanks