Co2 levels....di life help

So I finally got my co2 test kit from spectra pure and I got some results...



Ro only co2 13 ppm

Rodi co2 2 ppm



I was so concerned about this because I put a brand spanking new di cartridge in my maxcap 90 gpd and I made 50 gallons of product water and when it was done I was seeing 1 tds between the di and silica buster



Here's what I also did because I was desperate...

1. Added a pleated prefilter housing because I am on a well and have a lot of iron or some other orange chunky crap

2. Changed prefilter in housing...zetazorb absilute .2 micron

3. Changed silicabuster as it had had 5 di cartridges in front of it and I figured it was time

4. Changed ro membrane 99% rejection tested membrane



Now here's what I have...



Tds in...255

Ro tds...1-2

Di tds...1 at first but dropped to 0 after running for awhile

Product water...0



Here was my concern...di showing 1 tds after only 50 gallons of product water



Here's the question....



Are my co2 levels high enough to be concerned??

Should I make a bubble tower??

If so should I place it prior to the whole unit or between the ro and di??

If co2 isn't my problem what could have been the issue why the di is exhausting so fast??



Thanks



Stewie