um... did i miss something? that DI
resin in the original link is from AIR/WATER/ICE. I would buy it.
I would also take the advice on the TDS
meter. they will give you a more qualitative measure of the quality of your water, rather than eye-balling the color of the filter and DI
As for ebay seller "filterdirect". I have it and it HATE the horizontal DI
cartridge... the resin is constantly channeling or settling. I plan on upgrading my setup to a vertical DI
or a completely new RODI
setup entirely. anyway, he does sell DI
resin, but it is in 18 oz packages.