Dirty Vegetable Oil Tanks

I’ve been having a problem with dirt building up on the insides of my fuel lines and tanks. Inside the tank it gave like sheets of dirty leather that fell off and plugged my pipes and filter. I had thought that anti-bacteria fuel conditioner was going to fix my problems, but it didn’t fix them all. Is there a cure for this problem other then getting in there and cleaning it out with elbow grease?

See the pile of “leather” I got out of that tank!

It looks like corrosion on the aluminum piece I show here.