How often do you need to recalibrate PH probes?

[jpdarr]

Hey guys,
I bought my Profilux 3 a few months ago, as well as the expansion module. Everything has been fantastic thus far. The one thing I am wondering...
It seems that my probe that I have in my calcium reactor needs calibration already. Is this normal? Is the calibration method the same?
Thanks
Jason

[Antipodes]

Personally, I test every 3 months or maybe even earlier if I find the probes are not clean.

My previous controller I had to calibrate every month as it was not very stable.

Yes, Calibration is exactly the same way.

[mdanielse]

No it is not the same way......... , you should use different calibration fluids.... 7 and 9 (tankprobe) and 4 and 7(reactorprobe)




Yes, Calibration is exactly the same way.

[Antipodes]

Ah yes, I assumed he meant the same as when he first calibrated it?