Hi, I have a planted tank now and profile made my Ph go up slightly. I think that you have to rinse it for an hour to get rid of whatever hardens the water but it still raises Ph slightly in my tank. I know other people who say it does not. They say you can use Turface which won't raise your Ph but I have never tried it. You can get turface at www.yardgeek.com. It is 8.95 for a fifty pound bag plus shipping. If you try it, tell me how it works out. Thanks Teresa ------------------------------------------------------------------------- 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://www.digital.com for "Apistogramma Mailing List Archives"!