Fine Rust in tanks

[gator4life108]

Have a 82 GMC K1500 with the dual tanks. Been battling rust in the tanks. I have an inline filter before the carb that I change regularly because of the rust. Apparently some fine particles of rust have been getting past the filter and building up in the carb.

Anyone have recommendations on good in line filters to help keep out the rust? I have used Spectre and Fram so far.

Also any recommendations on what to put in the tank to help cure this? I have lately been running a lot of gas through to try and slosh the tank out of any further rust. Not really having a problem with chunks just the fine dust.