So you rather go through all the trouble of cleaning the tanks and all that, wasting so much money, you could get just a higher Micron filters.
This is what I found with a search. Not sure if this is what they used. https://www.northwoodstm.com/trailer-brite-aluminum-cleaner-and-brightener/
How long is a while? A bit of humor I asked the truck parts counter guy if he ever has done it him self or heard of using trailer brite to clean the inside of a fuel tank of algea, he went crossed eyed and said whaaaaat???