Hi everyone. I have been reading the posts on the site and decided to join. I take care of 2 pools the Park District in Grand Forks ND. One pool is 500,000 gallons and the other one is 256,000 gallons. We use bleach for the sanitizer and acid for PH control. Our season is short in ND the 2 pools are only open for 3 months. I have enjoyed the forum from reading the posts and hope to join in on the discussions.