Does anyone know good water specs for Oscars. I'm concerned because I have a Tiger Oscar that I'm growing out right now, and I had a slightly smaller Albino Oscar in with him until it passed on. I noticed that the Albino had developed a pink or red tint to its skin around the base of the gills and I don't know if there is something wrong with my water or what. I'm going to do new tests on the tank today, but if someone could reply as to what would be a safe range it would be much appreciated.