milwaukee regulator with ph controller question

[An t-iasg]

I only calibrated my probe to 7.0. The buffer (calibration) solution says 7.01 but your meter will just say 7.0. I remember that a separate enclosure in the directions (don't have them in front of me now) said you don't have to calibrate the low pH.

I rinsed my salty residue off in a plastic cup of distilled water. I didn't use suction cups to hold my probe in the tank, although you could. I just used the plastic strip on the glass top to hold the black cord in place.

[Robert H]

If you're buying a used one, be prepared to buy a new probe. They do wear out after a couple of years and give the wrong pH reading.

The more often you re calibrate it, the shorter the life of the probe. If your water parameters are stable you shouldn't have to re calibrate it more than once a year or so. If you move the probe to different tanks, you should re calibrate it for each tank.