SPS dieing and bleaching

[Trey]

Apex

Ph looks super low.
Calcium and more importantly alk appear to be very unstable.
Those two things alone will cause what you are seeing here...

 

[hyeclass]

Ph looks super low.
Calcium and more importantly alk appear to be very unstable.
Those two things alone will cause what you are seeing here...

New updated info i am running a air on my skimmer also have the windows open

 

[hyeclass]

On your APEX charts:

1) pH of 7.63. Probably not calibrated, but that would hurt corals.
2) A temperature swing of 5 degrees
3) Got nitrates?

My guess is your CaRx may be dumping CO2 into the effluent or leaking CO2 gas into the sump cabinet and the skimmer is injecting it into the the water. Check your chart history on pH. Keep looking backward for at least 4 weeks. Anything change?

Here is my ph reading, i got the ph buffer not sure if i dos it

 

[Trey]

Again that ridiculous alk swing will easily cause sps bleaching. Your Paramus just look unstable in general...