RID-X liquid formula for septic system treatment t 24 Oz. (3 monthly doses for tanks up to 1500 gallon)Septic system treatment liquid proven to break down waste and help prevent septic backupsContains billions of 100 percent natural active bacteria to prevent tank build-upEnzymes that effectively digest septic waste from household itemsHelps maintain a free-flowing septic systemPowerful dual-action formula