Storing the Boat Question

[thedink9]

I've just completed moving my family back to Long Island and will not have the time this year to use the boat. So I have a fuel storage question. I filled up the boat last November (with pre Ethanol fuel) and added the necessary stabilizer. Should I be doing anything else to the fuel given the fact that I do not plan on running the boat until next Spring? The fuel will then be 18 months old!
I was thinking of adding more stabilizer. Dink