Had dinner with a good friend who works for the Metro Water Dist. as a marine biologist and has been chasing the muscle for a few years now. He dives Lake Mead, Lake Mohave and Lake havasu every month and says its not looking good for many lakes. In his own words he feels that it could be as few as 4 years befor the coves at these lakes become completly over taken and rendered useless! They are only treating the water as it is being piped thrue the system and nothing is being done to the water as it sits in the lakes waiting to be pumped. Only a hand full of lakes in Calif. do not have the muscle as of yet but ony in time befor they do. They have run test at Lake Mathews in Riverside Co. to see what will slow it down or stop it and so far nothing seems to even slow it down! Some thing to think about if you keep your boat in a slip for long periods of time.