Thank you to everyone for saving me time and $$$. I went to NAPA and asked for Biopor but the guy looked at me like I was from mars. I did find a product by Power Services called diesel 911 it says that it kills microorganisms, d-gels fuel, and "desludges" the tank as they call it.
I bought the product and mixed it with a few small batches of diesel and have run about 7 gallons of this mix through the system. Today all of a sudden I have a much quieter idle. It sounds less metallic, better rythm, and less shaking. I assume this is due to the "desludging". I also checked my inline filter and it now looks like a giant slime ball.
First I will replace my tank screen. I am still going to look for Biopor and like everyone has recommended use about two tanks worth of treatment. Then I will probably continue to use this 911 product (since it is MUCH cheaper). Then once I stop plugging filters I will do a diesel purge.
PS. Did anyone else notice that nasty black goo, slime, crap all over my screen plug. NASTY!!!