rodi weirdness

[imisky]

Originally Posted by Cal_stir

WOW!, I'm from ontario, we consider that PURE water here, i would be ashamed to flush the toilet.
my TDS is 8 after a 1 micron particle filter, a 5 micron carbon block, a catalytic GAC canister, a 1 micron carbon block and a spectapure RO membrane.

TDS after my 3 pre filters drops down to about 2-3. Ive been in the hobby for about 8 years now and Ive only changed my RO membrane 1x and DI resin 1x.

like everyone else suggested you might need to flush the system (by pass the RO membrane) if the carbon in your pre-filters are new it'll cause your TDS to go up, and check for any blockage in the waste line, I had tried to get 0.5:1 waste to RODI ratio out of my unit before by restricting the waste water and instead of doing what I wanted it to do it did the opposite (should have been bluntly obvious that it wouldn't work but I thought I'd try anyways)