thisreverse osmosis membrane plus they usually have pre and post cardsellers what comes out the faucet from isprobably about as fair as you can get for how now back when I was in my early daysdoing the stack were there were not share the reverse osmosi     brain r8      s wasn't we had to gowith distillation and so we had to work onways to get it as clean as possible and I remember oneof the very first things would…