Im only running a 29g tank i just setup my kent R.O. unit and im only getting 30PSI. will i really need a booster pump or will I be ok? Only need a about 5 gallons per week for water changes? Just to make sure I put the pressure gauge after the carbon and before the membrane is that the correct place for the pressure gauge. Im still waiting for my TDS meter so I do not know what readings im getting right now.