After determining the cya was too high, We did a water replacement in March and had a month of perfect water. Then it rained and cloudiness started again. It's now been two weeks of SLAM and it's not getting any clearer. I don't have any overnight chlorine loss and the powder is white, settled on the steps and ground. I've backwashed and get white water for 2 minutes and then I run it clear for another minute. Then rinse before returning to filter. I know it'll be time to refinish soon because there are a few spots where the finish is coming off. Someone I was telling about it suggested it was the wall finish coming off. is there no hope for clear water beyond water replacement or refurbishing the pool walls?