I'm looking at a couple Coralife RO units and there's those with 2-stages and some with 3-stages. The only difference that I can tell is that the 3-stage unit comes with an DI filter.
2-stage Coralife Pure Flow II
http://www.bigalsonline.com/Fish_Hi...verse-Osmosis-Unit_7137025_82.html?tc=default
3-stage Coralife Pure Flow II
http://www.bigalsonline.com/Fish_Hi...-DeIonization-Unit_7136257_82.html?tc=default
Is it really needed though?
2-stage Coralife Pure Flow II
http://www.bigalsonline.com/Fish_Hi...verse-Osmosis-Unit_7137025_82.html?tc=default
3-stage Coralife Pure Flow II
http://www.bigalsonline.com/Fish_Hi...-DeIonization-Unit_7136257_82.html?tc=default
Is it really needed though?
