Marc, is there any way to test TDS other than the electronic meters? Would a general hardness test give the same results?
I really want to get one of the RO/DI units you sell, but I'm worried my tap water will clog the RO membrane in short order. It's very hard, and high in Iron and Manganese, so I'm trying to figure out just what home filtration I need. Unfortunately, the only water quality experts I can find locally just tell me I need to buy their system.
Thanks.
Phil