Microbe-Lift PL Gel Filter Pad Inoculant Quickly attaches to and populates filter media. Works with any media including foam, strapping, floss, bio-balls, ceramic media and more. The first product to put bacteria right where you want it and it stays there. Contains the same spectrum of bacteria as liquid PL. Organisms quickly attach to media, allowing for an 80% reduction on filter start-up time.