so tap water ph is 6.6 kh is close to 0 gh is close to 0. what do you all other fish keepers do to keep ph from fluctuating due to very low kh.? do you add buffers to bump up kh values thus increasing ph a little or is reguar water changes enough to keep ph in check? if u do add buffers do u also add buffers during water changes to match the kh and ph of the tank? pretty new so any advice is greatly appreciated!!!