Timing problem

So I pulled the tank for good measure. The bad gas has coated the tank in dried up bad gas and is crusted on the inside all over the tank.

At first I thought it was rust. The tank was new.
The brass float has disintegrated and was not even sitting in the sending unit and the fuel sock net was 50% ate up and gone.

Safe to say it was causing a huge problem.

What can I used to break down this bad gas?

Will post pictures