So I have an ro dI system and I really need to try and understand what I must do to keep the ph stable and the water minerals thatbare necessary in there. So I have equilibrium and I know that provides the gH level required as well as minerals needed for the tank. My question is, do I need something to buffer anything else? (kH/alkaline buffer or any acid buffers). Try to explain it as simple as possible as I don't have very much knowlegde with ro dI water. PS I must do this because my nitrates of my tap water is 80ppm.