Thanks Carl. Ben's chart shows that given my CYA of 100 to 200, my FC level should be 8 to 15 ppm). However, I have a lot of ammonia so Ben gave me a treatment plan to follow until the CC is down to 1 or 2. The interim plan is to add 6 gallons of bleach every evening, add a pint of muratic acid when the pH creeps above 7.0, and keep aerating.