Welcome to our forum.
You'll see this elsewhere if you search, but it is important to get total alkalinity (TA) correct, and THEN correct PH. Â Otherwise, PH is prone to swing up / down "wildly". Â It is "normal" to require PH increaser periodically, as the dichlor (chlorine) will have a PH lower than the ideal range for your tub, and will cause it to drop over time. Â I add PH increaser weekly, also.
Remember your experience with your water may not be right for everyone else either!Vinny