I'm sure this has been asked before but I wasn't sure. I always run out of trident calibration fluid since I usually calibrate my trident every time I replace any of the reagents. My calcium and magnesium are empty but my alk is at 50%. Should I replace my calcium and magnesium and wait to calibrate my trident when my alk runs out or should I do it now? what's the best way? and is it okay to not recalibrate every time I need to replace a reagent? thanks