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Originally Posted by kathywithbirds  Right now I've bought gallons and gallons of distilled from the store b/c I can't figure out why my RO/DI isn't working. I have a few weeks' worth of water changes in my tank with crappy tap water!!! |
Kathy, I don't know if this is the problem, but I remember setting up my RO/DI and the instructions said to throw away the first 10 gallons of water. Apparently the membrane has some kind of processing residue that must be flushed out. Also, I believe the membrane takes some time, a week or so, to become fully hydrated. Perhaps the TDS is reading that? Just a thought.