In terms of RO/DI units, is there consensus regarding what makes a unit good or bad? I've been reading through past posts, and it sounds like the combination of RO and DI makes a lot of sense. Price seems to range anywhere from $150 to $400. Besides throughput, what else should I be looking for in a unit? And, has the technology changed in the last few years? It feels like aquarium technology evolves quickly and I'm afraid I'll end up buying based on old information (even if it's only a couple of years old).
Recommendations for a 70 gallon FOWLR tank would be much appreciated. Thanks in advance.
Newbie Mark