This morning my apex alarm went off saying Alk is below range. My trident is telling me alk dropped 2 dkh overnight which I highly doubt. I've run another 3 tests with the trident over 3 hours and its given me the same results (so at least its consistent?). I double checked it with my hanna checked and its totally different. Hanna gave me a reading of 8.8 (my hanna has always been 0.5 higher than trident) so its exactly where I expect it to be. Anyone have any idea what could be causing thing? I changed all my trident reagents out a week ago and forgot to calibrate but its been running fine for the week so i cant imagine its just calibration.