> I've read in several places about folks using RO water with various SA > dwarf cichlids. I have an RO unit, but don't you have to have some > minerals and carbonates for buffering at all? How are pH crashes > avoided? You could add a small percentage (e.g. 10%) tap water to give you some minerals but still have low hardness or there are products you can buy specifically for adding to RO water. One product I am familiar with is Electroright made by American Pharmaceuticals. Ken. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!