Thanks so much for the replies. I will try that Al and let you know how I got along. My husband thinks that it is the pump on it's way out! All he can see is $$$ in his mind! I hope he is wrong!
Fortunately it is still running and water is crystal clear! Just really loud!
It's my day off today, and the sun is shinning. I'm going out to enjoy the deck (with the pump turned off!) for a few hours then I will try your suggestion.
Mary