I've started taking my Aluminum DB out in the sound this summer. I give it a good spay down with the hose after every trip. Is this sufficient to fight corrosion or should I be doing more?

i would but a zinc on boat and on the motor just to be safe

If the boat is welded aluminum, a good hosse down and brushing with a bucket of suds will help. However if its rivited, the rivets will corode faster than the rest of the boat and almost act like an anode. Hope you've gotten many-o-big fish this year Boss Man.

Robert