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... pH could drift down, it would be kinder on the equipment to initially set pH at 7.4 to 7.8 even though the dichlor sanitizing performance is not optimal at that level...
This issue has been solved. I changed my water which was really simple. I drained it overnight, wet vac the remaining water, cleaned the tub with stain and scale, rinsed and wet vac again. I did not soak the filter because I have Sundance Maxxus with the Microclean Filter. I did flush it out with the hose though. The line is gone! We have also mandated showering prior to tubbing. No more wax, hear gel, hair spray, cosmetics, and /or other interesting body gobily gook! Now I want to see how long the water will last. I alos bought a full Taylor water test kit so I can test all levels, not just PH, Bromine, and alkalinity. Yes, I plan to become a water chemist extrordinar! Thanks everyone for your posts!