So I messed up
left 3/4 tank of fuel in my Syclone over the winter, no treatment, nothing.

Now it started up not bad, however:
1. Wouldn't spool past 2.5 lbs pressure from the turbo
2. Getting over 3k rpm took time
3. Pressing the gas pedal down quickly choked the engine out completely
4. Incredibly rough idle.
Fairly certain it's bad fuel, it was running perfectly fine before being parked.
What are the best ways to clear out the bad shit? Do I need to drop the tank and clean it out?
I'm guessing new fuel filter is obviously needed as well.
It was suggested to me to use 1/3 can of Seafoam to help remove moisture and clear things up in the fuel system, is this a bad idea?