Zep Commercial has rolled out Septi-Tabs, a septic system treatment placed in the toilet every month. The Atlanta-based firm says it keep septic lines clear and odor-free and helps prevent backups at a cost of less than $2.50 per treatment. The fizzing action of Septi-Tabs releases waste-digesting, natural bacteria, which produce enzymes that effectively break down wastes, restoring a healthy balance of biological activity. Unlike some other septic system treatments, the Septi-Tabs formulatio...