I was curious, is there a product out there that allows you to raise the kH and the GH without affecting the pH? I am making RO water, and I want to raise the kH to right around 8°dkH and the gH to around 15°dgH+. I've been using RO right to treat the water and then I've been using Cichlid Buffer from Kent, however, I can't raise the hardness of the water without significantly raising the pH. The reason I'm going through the trouble is that I want to emulate another water source, that has been the source of water for my tanks. Anyone know. . . ?