Discussion Starter · #1 ·
Besides the obvious, what are the main differences between RO, RO/DI and RO "drinking water" systems? Which is recomended for a marine aquarium? would 2 3 or 4 stage RO unit be OK for aquarium use? Since an RO can be had for about $100-200, compared to the others at $260-$600, Id rather save the money if an RO is all thats really needed in a marine aquairum? What is the difference in water quality, chemicals and impurities removed, etc between the 3 types?