Hello Coby I wait like at least a week after free swimming before doing water changes..... I use my tap water all the time, benefits of awesome soft slightly acidic tap water... hehe... sorry for bragging guys... and i never worry about the slight difference in pH change.... i do make sure that the water is slightly aged and around the same temp as the tank temp.... Other then that go for it, as Rocky would say! Adirondack Johnny..... PS.. tundra johnny hasnt been lost..... supposed to snow here on friday.... but its in the 70s today!!! wooohooo spring is on the way! ----------------------------------------------------------------------- -- 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. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader