Thank you phonedave. I've stopped the MPS and actually, thank you for that link. When you add the liquid chlorine after the soak, is it generally the same amount/quantity?
Same quantity as what ?
I add about 2 oz of liquid shock, because I know that is what works. That is based on two people for 30 minutes or so. Depending on how many people there are, how long they are in the tub, and how 'dirty' they are, you will have to adjust that amount.