<a href=showthread.php?s=&postid=14697138#post14697138 target=_blank>Originally posted</a> by vegaskid11
It doesnt matter what unit you use. What matters is whats in the canisters.
The BEST membrane is from Spectrapure and its there hand inspected membranes.
Your next best bet is the dow filmtec 75.
You need minimum 1 micron (.5 is better) sediment filters follwed by some type of carbon filter.
If your source TDS is above like 200 then you will need to use some DI resin. Use a vertical refillable DI canister as your last stage and you are ROCKIN.