That's excellent! All those years of fighting algae... And opening with frogs? Oh my! I know the K2006 and all the help from the great moderators here at the Pool Forum have truly made you feel confident and in charge of your pool. I know I am in debt to this forum and am so very grateful. Good job on hanging in there and believing! Enjoy the rest of your season! Btw, did you ever resolve the roughness of the pool surface?