Bio-Active septic tank treatment from Walex Products is formulated to use powerful, natural ingredients to destroy and liquefy waste in septic tanks and cesspools. It can be used monthly to overcome the destructive effects of household products, such as bleach, detergents and chemicals. The product is promoted to help keep septic tanks and drainfields working efficiently and maximize tank capacity while aiding in the prevention of clogs. It helps reduce solids and restores the population of worker bacteria and enzymes, keeping the system healthy between recommended pumpings. 800/338-3155; www.walex.com.