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Unread 09/14/2017, 07:41 AM   #31
karimwassef
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Join Date: May 2004
Location: Dallas, TX
Posts: 11,033
I do monitor the CO2 of the intake air and I've confirmed that it's the same in the air around the submerged injector.

If I use internal house air, I'd have to constantly adjust my loop manually.
If I use external fresh air, there's little to no variability and I can just use pH.

The injector removes one major variable (CO2) leaving pH as the controlling variable to Alk.


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