I'm at a loss tonight, I only dropped 1.2ppm today, SWCG off. That a large difference from yesterday's 4.3ppm drop. Started at 8am with 3.2ppm, adding 1/2 Gal 10% this morning to get it to 7.4 and I ended the day with 6.2. So the only question left is how much chlorine is the SWCG producing. I...