I think what the utube was trying to say is don't totally submerge the digital that will kill it, and to calibrate the brinsea you have to set it to a regular thermometer then under the panel mine was top and on the side is a screw that you can turn to adjust, it just takes a quarter turn to adjust the temp, I would wait at least 30 mins between adjustments to make sure of temp. I hope this helps and yes we all would be committed if our children only knew.
