Just set up new tank. calibrated the pH probe and all seems to be fine. Yet in salt water in tank its reading over 12! Checked against another test kit and ph is about 8-ish... but as soon as probe goes in either the sump or display it is reading 12. I've not got it crossing any wires as tested that.
It is mounted in holder and salinity and temp are ok. ORP is creeping up (as expected to stabilise), just the pH is way out... I would have expected the salinity to be showing weird if anything...
is the probe damaged? How can i check.
Any ideas? ;-/
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