PH probe calibration

Expansion modules and attachments

Posts: 80
Joined: Tue Dec 27, 2016 6:26 am
Location: Jacksonville,FL
PostPosted: Sun Oct 22, 2017 6:07 am
Hello everyone,
Have not had any issues lately until now.
PH probe started reading low. Recalibrated with 7.01 and 10.01 solution. 7.01 = 395 and 10.01 = 686. Does this sound correct?
The probe reads 8.43 at night and 8.57 during the day. Checked against Salifert test which reads 7.7 at night and 8.00 during the day.
Did all the usual tests with water out of tank in cup and electrical stuff turned off etc. Numbers stay the same for the probe.


Posts: 3
Joined: Fri Oct 09, 2015 8:33 am
PostPosted: Sun Oct 22, 2017 10:34 am
I had my calibrated too. It's reads 7.01 all day and at night 7.00.
I test it with Salifert at 8.0- 8.2. I have outdoor air pump into my skimmer and an air bubbler in the refiguim. I just use the 7.01 reading as a gauge if it goes really low I know my pH is off. I wish too it is really" calibrated"

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