Can't lower the PH in Calcium Reactor

[robocop1906]

Hello, I've had my GEO CR612X2 Calcium Reactor since 2021 and this week the PH in my reactor started to rise and no matter how much I increase the bubble count it won't go down but if I reduce it the PH does rise.

Equipment: GEO CR612X2 Calcium Reactor; CarbonDoser Electronic CO2 Regulator, APEX PH Probe, 20lbs CO2 tank

What I've tried so far:
- Recalibrated the PH probe
- Checked the circulation pump to ensure it's circulating the water
- Switched the carbon doser to my 5lb backup tank
- Increased the pressure to 15psi vs 12, then back down to 12.
- Increased the bubble count to as fast as it can go and as slow
- I did just switch from Two Little Fishes to Aragonite a few weeks back.
- I do see the bubbles adjust when I adjust the counter

I am seeing a leak where the circulation pump is plumbed into the reactor chamber. Can't figure out how to stop it, not sure it that has something to do with it.

 

[robocop1906]

I've run the reactor between 6.4 and 6.5. Currently running at 6.6

 

[Macdaddynick1]

How fast is your effluent running? May be you need to get a brand new probe.

Edit: Also perhaps the media is using up CO2 faster by melting faster than tlf. Are you able to keep up with the demand at that ph?