CO2 in supply water - RO/DI?

[Reefer Dan]

I am suspecting that my RO supply water has excess CO2. I’ve been burning through my DI resin faster than usual and I’ve noticed my RO/DI water containers having a lot of bubbles in it. Are these signs of it? Any simple ways to test this that don’t involve buying a test kit I will likely only use once.
Thanks

 

[Malcontent]

That's probably mostly nitrogen from tap water being supersaturated and then warming up to room temperature. To test CO2 more specifically maybe you can measure pH change as it's left open for awhile?

 

[Reefer Dan]

That's probably mostly nitrogen from tap water being supersaturated and then warming up to room temperature. To test CO2 more specifically maybe you can measure pH change as it's left open for awhile?

Excellent idea, and very insightful.