Purchased used APEX and the ORP (I think) looks a bit old. I don't have saltwater yet, just fresh for Apex setup so the numbers are misleading. So the readings for both PH probe and ORP (PH2) are between 6 and 9.
Also the ORP (PH2) probe comes up as PH on fusion.
Did Neptune ever have a red PH probe?
If not what is going on?
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