Modular covers from Geomembrane Technologies (GTI) control odor and algae and provide thermal protection. The covers reduce the effects of wind and sunlight. Gases are held inside, limiting odors and algae growth. The floating covers accommodate water level fluctuations. Workers can safely walk on them. Cover panels can be opened or removed for basin cleaning and other maintenance. They are constructed with durable polyethylene and resist chemicals, environmental exposure and UV rays. They are custom designed and suited for aerated and nonaerated systems. 855/484-4630; www.gticovers.com.