Has anyone experienced a significant reduction in top speed due to algae? I bought a boat (Charger 195) and used it for about 2-3 weeks before going on vacation. The top speed was about 60 mph. When I came back from vacation, about 4 weeks later, the top speed was only 35 mph. I had the motor checked, which didn't have any problems. The water conditions were about the same for the comparisons. The dealer claimed that algae was the problem. I've heard you might loose about 10 mph but this seems excessive. Does this make any sense to anyone?