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? Using pure water like that is new to me. -- Kelly Beard, Cat IV (on sabbatical) President, Allanti Cycling Club Innovative Computing Corporation ------------------------------------------------------------------------- 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"!