Quote:
Originally Posted by wbodei 
WRT = with regard to. So, with regard to RO units...wondering about them still as well.
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The best RO/DI units use the Filmtec 75GPD membranes. The rejection rates are much better for that membrane which means that your DI resins last longer. DI filters are best if they are up and down vs layed on top of the RO unit. One of our sponsors sells some pretty good ones.
www.airwaterice.com Reefkeepers
Buckeye Field Supply has some nice stuff too.
There's one thing that you'll NEVER regret.....good quality water for waterchanges and for evaporation topoffs. A lot of people get into this hobby and a lot of people leave this hobby. The people who leave usually leave for one reason....ALGAE. They just get so frustrated with algae they quit. Using phosphate free RO/DI water with zero TDS will help you greatly in avoiding algae.