I drained over half my pool a few days ago to get my CH down some because it was at 630ppm. Well I overshot the drain and when I did a test (Taylor K-2006) it was at 110ppm (11 drops). My fill water is 70ppm. Anyways, I wanted to get back up to around 200ppm but I wanted to do it slow so I started with 10lbs calcium chloride. Adding 10lbs should have brought me up to around 150ppm per the pool calculator. Checked it today and low and behold it came out to 320ppm (32 drops). What happened? Is there something wrong with my calculation or is there something wrong with the pool calculator? I let the water mix one day when I did the refill and waited another day after adding the calcium chloride before testing.