Hi, I live in WI, as you may have seen on the national news we have had torrential downpours (about 10 inches in less than 48 hours). I had started conversion about 3 days before the rain and had the pool overnight once at 15ppm. Then the rains, had to drop the level of water twice and of course, no chlorine left after that, now what? Do we start over? We have a 27' round ag pool with a sand filter. Thanks for your help.