3rd chamber on CO2 reactor?

[shiftline]

I drilled a hole in the lid. Then tapped in threads and added one here

Probe holder was a waterproof wire connector from the hardware store. Was a tight fit!




The tests of outputs weew just from dripping into a cup with a ph probe




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[sphelps]

Gents, consider using the finest calcium carbonate media you can for your second or final chamber. This should increase the effectiveness of that final chamber. Also to combat lower pH associated with CA reactors dose calcium hydroxide as a suplement with a doser or in your top off water if applicable. Alternatively there are alkaline filter cartridges available for RO filters which add calcium and magnesium to your source water to bring pH back up.