3rd chamber on CO2 reactor?

[shiftline]

I lost a bunch of sps a while ago. I have no idea why. Only big change is lower ph. So may be pointless but if I can get it back over 8 I think my tank would be happier.

I did some testes of the effluent after my main. Single chamber reactor then after my diy add on chamber and the ph is about 0.25-0.27 higher

After reactor


After second add on chamber


I also observed the ph slowly climb as the effluent sat in a cup. Adding an airline to the cup accelerates this. Which makes me think of maybe add a settling chamber with an air stone. Or output effluent in front of skimmer intake. Maybe be stage 3


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[Delphinus]

Where do you have your pH probe? I have the same reactor myself, I have the effluent into a little cup that overflows into the tank, and the probe sits in there. If I add a second chamber I still want the pH probe on the first chamber effluent so I was thinking of DIY'ing some kind of inline probe holder.