My parents have a 33000 gallon pool. They rely on pool stores to tell them what to do. I personally think they give them the run around. Right now their fc is 1.1, tc 2.2, Cya 130, ph 7.3, total hardenss 307. They are tell them they need to put 15 pounds of super sol and if that doesnt work 5 more pounds.They have put a ton of money into chlorine already. I guess the pool is tied up.