I just received my canning jars. Looking at RH meters now, I have a simple temp / rh meter for the tent, not sure how accurate it is. I will use the 5x5 tent for drying while the seedling tent starts the next batch of seeds. Have been reading about the boveda pks for the canning jars, might try them.I was also looking at the rh meter that fits the center of the tops on the ball canning jars, just not sure what to try first. Still reading as much as possible.