Reef Angel Forum

Is it necessary to calibrate the PH probe to 4-7 instead of the 7-10 calibration if you use the probe in a calcium reactor?

You could if you wish to do so, but I think the linearity is good enough.
There was a user contributed calibration function that was created by phrusher that allows you to do that.
Would you like to try?
Add this to your setup() section of your code: This will let you change which values you want to calibrate.
I've never used it, but the author indicates it works.

I used this last night and it worked great.