2 Days ago i manged to get what i was told was a pair of breeding yellow labs. the pH in my tank is 7.0 and i know these fish need 7.3-8.0 but would they do ok at a constant 7? anyone any experience of keeping these fish outside their pH range??? My tap water is 7.0 you see. Are chemicals a no-no to increase the ph? How else would i increase the pH??? btw, i paid £35 for the two fish they are about 2.5" long, is this a fair price??