bottom coat

What is the best bottom coat everyone is using? My boat will be sitting in a slip net year in Lake Michigan and would like to take care of this before storage this year.

As always, Fish Hound with super helpful advice. Guy knows his stuff, for sure.

With your boat having never been bottom painted before a barrier coat is STRONGLY recommended to prevent water from being absorbed through the gel goat and into the hull. I would recommend you put your boat in the water yet this fall to mark the waterline with a normal load aboard so you know how high to run your barrier coat and bottom paint over the winter months if your in heated storage. West Marine has a great tutorial on line that is worth the 20 minutes to watch, listen, and learn. Properly preparing your boat can prevent many future problems. West Marine DIY Bottom Painting

Its a fiberglass boat and has never had a bottom coat on it before.

Is it a fiberglass boat? Has it been bottom painted before?