I've been using stabilized chlorine granules for sanitizer. Our fill water is high on the alk side and since I have to drain it every month or two..I thought I would try to balance the water. After I reach a good level of PH, how often should I add chlorine? I used to add sanitizer only when we were about to enter the spa. I'm new to this BBB method and I thought I would use some of the principles on the hot tub. (We had the tub before the pool)