How often to calibrate the pH probe on a Control 4?

[Mike]

My control 4 has been running constantly for almost 6 months now. What is the interval that Coralvue recommends for recalibration of the pH probe? Thanks.

 

[Carlos]

It all depends on the probe. The rule of thumb is every 3 months, so you are probably due for calibration. Have you checked with a pH test kit to see how close the probe is?

 

[Viva'sReef]

I would do it every 3 months. My drifted way up and I thought I magically was running around 8.3-8.4 with the house all closed up and AC on but it was really running around 8.1 and down to 7.8 at night after I recalibrated.

 

[osvaldogarza21]

@Carlos In addition to calibrating every 3 months what is the recommended cleaning solution for the Ph probe? Figured this was the best place to ask this question. I understand that we shouldn’t touch the probe or scrape it with anything. Any advice?

Thanks in advance.

 

[Carlos]

This is what American Marine recommends here under "Maintenance and Cleaning":

Clean the probe tip gently every 3–4 weeks using a SOFT TOOTHBRUSH with LONG BRISTLES. Push the probe tip down into the wet bristles and rotate the probe 3–4 times. This will clean the inner surfaces of the probe as well as the sensing glass and reference junctions.