With my new TF-100 test kit, I've been measuring 180-190 CH. I'm wanting to target around 300ppm, so I bought 15 lbs of calcium chloride. According to the label, 4 lbs in 10k gals equals +40ppm, so that would mean that 15 lbs in 25k gals should equal +60ppm. I added 5 lbs last Fri morning, 5 more Sat morning, and 5 more Sun morning. Last night, I tested the CH, and it was 210ppm. Notwithstanding operator error, what is going on? I'd like to discount operator error b/c this is a simple test that I feel confident with. I assumed that 3+ days was enough for all of the Ca to dissolve.