I used Aquagard this year. Seemed to work.
Me too. I painted the dink last June and it was in the water in NJ for 3 months then Florida for 6 weeks. The marina year-rounders all magically appeared as we hauled it before departing. After a lot of "we told you it was going to be bad" my wife and I spent 30 minutes brushing and hosing as it hung on the hoist. Then we put it in its chocks. It's all set to paint again next year.
If I had the guts I'd use this stuff on the mother ship but I really like Petit's anti-slime ablative.
Dave