Any idea what could be causing the ph probe on the apex to behave like this? Large changes within minutes

[Drewe]

Is this an equipment issue or something in the tank doing this? The actual pH is 8.25 when the probe is acting normally and also backed up by a secondary testing apparatus.

It hasn’t been calibrated in a good year or so but I’m struggling to see how that could cause it to send alerts like this and then minutes later revert back to a normal reading. ATO isn’t cutting on in between, nothing is changing or being dosed when this happens.

The probe is on a Neptune magnetic probe holder in the bubble trap between the refugium and return chamber. This started suddenly today.

Any help is majorly appreciated because the phone notifications are obnoxious

 

[Coolcasino]

Calibrate it. Its been a year. Maybe it will go back to normal.

 

[Drewe]

Calibrate it. Its been a year. Maybe it will go back to normal.

Oh believe me I will, I ordered new calibration fluid tonight. I just can't wrap my head around an overdue calibration causing something like this

 

[Projects with Sam]

is the glass ball at the bottom intact?

 

[Coolcasino]

Has happened to me. sometimes it will start to drift up and that's how I know its time to calibrate. Only a couple of time it just plummeted. I'm just surprised you've gone a year without calibrating. When you get the solutions just place the probe in the 7 without starting to calibrate it and see what you get.

 

[fishgutz]

This will happen when something is calling across the glass probe in the end. Any king is small snail, asterina can give false results temporarily. I see it often.

 

[blaxsun]

Are you sure it's not just running close to one of the alarm thresholds? The continual on/off thing is indicative of that.