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tds ro/di
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  1. General Reef Discussion
    My RO/DI is pumping 2-3 TDS now and I can't get it to zero. The RO has got about 6-7 TDS coming out of it, so I guess it's my DI that's spent? Should I change it now or wait till it's doing nothing. I'm really thinking that I should change it ASAP before I start getting red slime and green...
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