Insinkerator bio-charge cartridge replacement with fresh citrus-scent for evolution septic assist disposers is a cost-effective enzyme treatment. Bio-charge contains a natural microorganism that helps break down food waste and a citrus scent to help control odors from the sink and drain. Bio-charge is only for use with the evolution septic assist disposer and will last 3 to 4 months with average use. One cartridge of bio-charge equals 4 bottles of other septic treatments. Size: 16 ounce replacement cartridge super concentrated equals 4 bottles of other septic treatments last 4 months natural microorganism helps break down food waste fresh citrus scent to help control odors breaks down soap and grease film in drain pipes only for use with the evolution septic assist disposer Brand: Insinkerator Size: [1]