Mask and Fins I
While you're at the sandbar or rafted with friends, dive overboard and inspect the boat's bottom. Usually, the transom can stand a scrub to remove fouling, since not much "washing action" occurs there. Ditto for the scum line above the painted waterline. You may also have a layer of slime on your boat's bottom. The trick is to remove the growth without removing too much bottom paint. We use a scrap of shag carpet with good results. It removes soft growth without scuffing off too much paint. For hard growth, like barnacles, use a paint scraper with the corners filed round to prevent gouging. Or, buy the Dirty Bird Scraper ($42, topshelfmarineproducts.com) with rounded corners, a prop shaft notch and a pick for cleaning intakes.