Seriously, you don't want to waste 6 bucks worth of shit gas? you'll pay 4 bucks for a filter THAT WON'T FIX your problem? Drain that shit gas like Recon said. Filter it and use it in a less sensitive engine like a lawnmower or car. Now, take some kerosene or gas (small amount) and toss in a handfull of drywall screws or nuts (count how many you put in!) and shake that tank around to remove as much loose rust as possible. Then get a Kreme kit and treat the tank. Taking the easy way out here will only make your problems worse. Ignore it too long and you'll end up with a hole in your tank.