I got home yesterday Freddie and all is well. The salinity was 34.5 not 52 which the Apex was saying but I have a video feed and all looked well. I’ve done a water change today and cleaned all the Apex probes in a 50/50 vinager mix so will just leave the probes a few days and then recalibrate the salinity if it needs it, which is probably will. It’s currently reading 27 but it’s only been in an hour or so. I’ve tried to automate things into Apex that may need switching off in my absence but anything that should always be on, like the main return pump and rear circulation pumps are still in the power centre.