Buying RO / DI - I know nothing

[jsmth321]

I use a Aqua FX but without the DI. (Just sediment, carbon and then R/O membrane.) I decided against the DI as I get 0 TDS without it, and the water out here isn't that bad, and I have never had any issues.

[macky]

I have this one from Costco and installed it under my kitchen sink. I use it for my tank and for drinking water. http://www.costco.ca/Browse/Product....rodid=10300796