PetroGard VI geomembrane odor-control floating covers from MPC Containment help control odor produced by methane gases, reduce or eliminate algae, and allow for temperature control and stability. They have a base fabric weight of 7.5 ounces, giving it a high puncture resistance and allowing it to withstand harsh environments. All floating covers are custom designed to meet individual facility needs. 800/621-0146; www.mpccontainment.com.