I had purchase this Aquasafe 6-Stage RO/DI system 10 months ago. Paid $130 with pressure guage & TDI Meter. Never used the TDI meter. All filters need to be change!!!
First $50 cash takes it.
Hey, I actually just got this type of RO/DI unit a few months ago. How do you know when to change the filters? Mine came with 1 extra resin cartridge, and some spare parts, but it's my first time using one of these that does not have a 'when to change me' sign!