The only thing I have ever used is peat moss from the Garden Center. I throw a few handfulls in each of 3, 5-gallon pails and let it soak for a few days and then siphon it out through a fine fish net and also a brine shrimp net all at the same time. I refill the pails with Ro water and can use the same peat 3 or 4 times. The pH is around 5.5 and I mix it half and half with untreated RO water. I have bred T. candidi & Ctenopoma ansorgii by this method. The bales of peat moss are a lot cheaper than any store bought pre-mixed solution. Z-Man ------------------------------------------------------------------------- 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"!