Mike Wise writes: <snip>> If you are using it to produce water for blackwater species, I would use > straight > RO and add peat or some sort of blackwater extract. So what if I'm using DI? Can I use it straight? And for Whitewater/clearwater fish like aggies and cacatuiodes- do I need to add something to it, or would peat still be appropriate? Bob Dixon ------------------------------------------------------------------------- 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"!