So I've been running the apex for about 2 weeks and my salinity readings were fine. Yesterday it started throwing alarms at me for salinity over 38 ppt. I double checked it vs. my Milwaukee refractometer and a hand held thingy. Both read at 1.025-1.026. Has anyone any insight on to what is going on with the probe? Does it need re-calibrated? I use it for "TRENDS" not accuracy. But nothing has really changed in the tank to cause the spike at the probe. I have it grouped with the other probes in my sump in a holder....I know there's some "break in time" for these probes, but I've also read there can be interference from other equipment. Just kinda looking for some insight as to what is going on. It would be nice to be able to TRUST the trends of the probe readings?