RO versus RO/DI

[sailsurfski]

I am on a well for my water supply. The pH is 5.9 and the alkalinity in dKH is 1.5. There is an online calculator that comes up with a CO2 level of 56.66 ppm. I have been told that this high of a CO2 level will deplete DI resin so fast that it is not really a viable option.

There is some kind of aeration-degassing DIY gizmo that I haven't researched yet. What are your thoughts on just going with RO?

 

[AZDesertRat]

What are your TDS readings from the well water and from RO only? If you have a very good RO membrane such as a Spectrapure Select series which is individually hand tested and guaranteed to be 98+% rejection you may be OK but I would recommend adding DI personally.
My tap water TDS is about 835 due to Colorado and Salt River waters but my Select membrane takes that down to between 5 and 6 all by itself. Of course adding the MaxCap dual DI system takes it down to 0 for a long long time even with our high CO2 content.

 

[sailsurfski]

I don't know what my tds is for the well. I plan on ordering a handheld meter when I order the membrane and the DI. Jim, at the filter guys was the one to tell me about the CO2 killing the resin real fast.

Where was it that had the spectrapure? How high is your CO2?

 

[sailsurfski]

^

 

[AZDesertRat]

You can buy Spectrapure products directly from them at www.spectrapure.com or through vendors like Marine Depot or Premium Aquatics. I would contact Spectrapure here on RC in the Sponsors Forums and pose the question to them directly.
I am at work and don't remember my CO2 levels but Spectrapure can answer that one for you also as they are located here in Phoenix too.
Spectrapure has directions on how to construct a CO2 degassing chamber that they can direct you to.