A reasonably high quality replacement foam is available from Summit but you need to remove the degraded foam from the cell and flush all debris from the system up to the filter where you found the particles. Summit's listing used to claim that their product was the same speced by the military for aircraft. I can say that it holds up to racing fuel, VP C25, and is blue in color. Just remember to leave an area, void of foam, immediately around the tank discharge fitting; some of the racing pumps are so aggressive that they have been known to pull off chunks of foam from the media.