Ok Bob, then how come my pH goes up. I use dolomite to make my water harder and more alkaline, this keeps my africans happy. I hate using store bought chemicals to raise my pH. My method of using dolomite for my tanks does what I want it to do. Cause my water not to be soft and not to be acidic. Isn't that what I said it would do? So by using dolomite, my pH goes up. Isn't that what the original thread asked about, getting the pH to go up? John ------------------------------------------------------------------------- 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"!