Hi all,

I hope someone can help. I have the profilux 4 ultimate set. After calibrating the redox probe, following the instructions carefully from the manual, the reading I am getting is 1000 and it doesn't move. It is plugged into the redox/ph slot.

I am getting a similar issue with the reading from the ph probe. After calibrating it reads 10.5 for a while then it will jump about dropping to 7-8 then gradually drops to 3 and doesn't move. The probe is plugged into the ph/redox slot. Could the probes be faulty? They are brand new so I wouldn't have thought this would be the case. I have calibrated multiple times with the same results. First time I tried equalizing the temperature of the ph solutions with the tank by floating in the sump. Temperature was 26 degrees. Then I tried without doing so as I was told the probes automatically adjust for temperature to no change.

I am hoping someone can help resolve this issue.

Thanks in advance.

Jamie