Over the years, I have been the primary person in the household to manage the hot tub.  Since I am pretty much the only person who sits in it on a daily basis, it’s a fair request. I do a pretty good non-technical version of managing the chemistry.  Weekly and daily or every other day, the hot tub needs managing. I left for the weekend and didn’t have anyone watching the hot tub in a 4 day period, after sitting in the tub with a Friend a few days before I left, hadn’t run the motor. Because the motor seemed to be slowing down.  The water was taking longer to.