So my PH and ORP probes both produce these strange drops at random times through the day, then pop back up to the correct reading. My PH probe was calibrated twice two days ago with 7 and 10, and is showing the correct PH reading. Both of these probes are sitting in the third chamber of my sump, with the return pump. The thermometer probe is sitting in the first chamber with the drain/skimmer. Any insight to what could cause these strange blips? I have yet to "Restart" my apex and I have re-seated the connectors.