"NBREEFER", Thanks for the info I'm waiting for My ro/di unit. My Uncle is giving me one for free. There was once a craze in these units for houses,but it fell. Anyways I get about 10-20 every two weeks, Which is way I'm getting a RO unit, plus no morer back and forth trips to the store.
Still haven't found the TDS tester I'll let you know I soon AS I do.