So, opened my 19300 gal round Monday. My FC was 3 and I wanted to shock it (it was clear, but I like shock on opening). Just FYI my CYA was 75 so I was shooting for an FC of 31 just to be safe. So, I goto the pool calculator and put in my numbers. I used 8.25% bleach from wally world (@ 2.98 for...