The Ultimate In Catch Basin Inserts Removes Dirt, Sediment, Hydrocarbons, And Utilizes An Effective Antimicrobial Coating. Same hydrocarbon and sediment removal capabilities as the Ultra-Drain Guard, Oil & Sediment Plus Model (see page ) but with additional antimicrobial properties. 1.5 x 20 strips of Ultra-X-Tex AM (Antimicrobial) hang from the bottom of the Drain Guard and become immersed in standing catch basin water, allowing contact with destructive bacteria. Antimicrobial coated Ultra-X-Tex tentacles help address stormwater related issues with single-cell organisms (bacteria, fungi, yeast, and algae) that are found in stagnant stormwater and catch basins. Helps comply with NPDES, 40 CFR 122.26 (1999) and TMDL requirements. Ultra-X-Tex AM Strips: Add hydrocarbon removal capacity Offer antimicrobial coating Reduce odors Reduce mosquitos.