downhillbiker
New member
Is 3 TDS after an RO/DI unit good enough to keep SPS corals? found a unit i want that does 300 TDS to 3 TDS, and want to know if that is good enough.
I only have 30-40 TDS tap water, but will eventually move, and don't know what my water will be like then.
I only have 30-40 TDS tap water, but will eventually move, and don't know what my water will be like then.