I'm in New England too, and looking for some guidance. I believe that if you're using the BBB method, you want to clean it as well as possible, get your chlorine and other numbers (like pH) as perfect as possible. Use some Polyquat algaecide (remember, that's a type of algaecide, not a brand. doesn't matter what brand). Not sure how much, but perhaps a whole quart.

I'm hoping someone here who's knowledgeable will jump in and provide some details.