My water source is from a well with relatively Low GH (3-4) and very high kH (160-180 range). My pH is around 8.2. I am installing a R/O unit and this is my first experience with one. Its my understanding that the R/O will remove all kH. What will it do to pH? I would like to re-constitute/buffer the water that is held in my reservoir to get back to a pH around 6.8-7.2 and average kH (whatever that # is). What products or methods would you recommend? And is there some interaction with CO2 that can bounce pH around during this process? Thanks for your input.