The WSB clean pro commercial wastewater treatment system from RH2O North America is available in a wide range of sizes for precast concrete and fiberglass tanks with flows up to 200,000 gpd. Each system is designed for the requirements of each project, and is available for new installations, retrofits and upgrades of existing plants. It uses self-cleaning media that never has to be cleaned or replaced. Systems have been used successfully across Canada in high-strength wastewater projects with influent BOD over 2,000 mg/L and producing consistent effluent BOD/TSS of less than 10 mg/L. 519/648-3475; www.wastewater.ca.