I have an 18 month old Jacuzzi. I am using chlorine pucks in a dispenser and spaboss shock. I am able to keep the alkalinity and chlorine relatively stable however my PH drops on a weekly basis to the point where I need to add PH up. I use the tub 3-4 times a week and shock after each use.
I have had hot tubs for 35 years and have not experienced the ph dropping without a corresponding drop in alkalinity.
Any ideas on what could be causing this?
Regards
PW