3 months of treatment. Treats your septic system like Rid-X for less (per recommended dosage, based on Nielsen pricing data). Commercial line. A family company since 1886. No-mess. Dissolvable pouches! Just drop & flush! Works safely in all tanks & pipes. Concentrated formula works with natural enzymes! Breaks down solid waste, paper, oil, grease, & protein to help prevent septic backups! (along with regular pumping). Environmental Facts: Works with natural enzymes. Product not formulated with phthalates.