I use almost all r/o, but a little of my hard (15dH), alkaline (7.8) tap water does get added from time to time. I usually do not add black water extract for breeding apistos unless it is a more challenging species like nijsseni. --Randy Tim R wrote: > Just a question to see what people are adding to their > RO water, if anything, for raising and breeding Apistogrammas. > ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!