I have a pretty new (3 months) 10,000 Gallon, SWG, pebbletech pool. I’ve been tryin to lower my ph to 7.4-7.6 and my Alkalinity to 80. I’ve added 3 Lbs of dry acid 1 lb at a time over the last two weeks! Neither reading has budged, holding at 7.8 and 120. What am I missing here? Testing with the...