2004 Sylvan Sea Snapper Care

[lv2phsh]

I have a 2004 Sylvan Sea Snapper aluminum boat. Real simple original set up with three benches. I leave it in a Maine lake for the summer. I’m trying to figure out what kind of maintenance I really need to do. How much cleaning of algae stains off the hull? Does it need to be painted to prevent corrosion? Do I need to add a sacrificial anode? Any advice would be greatly appreciated.