I have a 1 week old 40 gallon glass aquarium. My PH is 7.6 from the tap. All the books I have read are telling me that these fish (Arowana and Cichlids) prefer a pH of 7.0. It sounds like short of installing an RO system there is no good way to lower my PH. So my first question is can an Arowana and South American Cichlids stay healthy with a pH of 7.6 And if not just how can I go about lowering the pH? Any suggestions will be greatly appreciate. Thanks in advance.