In a message dated 10/1/00 10:23:22 AM Mountain Daylight Time, sturob@swbell.net writes: > (1) What's the best way to test pH that low? Most colorimetric tests > seem to bottom out at 5.5 or 6.0. Electronic pH meters. You can find them online or check with your local pharmacist, who buys them for store use all the time. > (2) What's the best way to BUFFER a pH that low? The last thing I'd > want is a really unstable 4.0, since my water hardness (DI) is nearly > 0. You don't buffer a pH that low. You "live on the edge". Keep your eyes on it. Check it twice a day, and keep up your standard tank maintenance. Bob Dixon Cichlid Trader List Administrator º o http://cichlidtrader.listbot.com 0 ><}}})º> ------------------------------------------------------------------------- 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"!