hey, Anyone know of any Ph changing rocks, I'm trying to raise the Ph in my tank so I can convert it to cichlids. The only one I'm sure of is limestone, and of course the calcium rich coral skeletons, (i've currently got a large finger coral in mine, the LFS owner convinced me It'd raise the Ph. I'm pretty much doing what I can to get the Ph up as fast as possible, since theres no fish in the tank but a pleco, and the LFS just got a beautiful new shipment of africans in. Any other ways on how to get the Ph up will be appreciated. thanks, Jacob