BioOne Drain and Septic System Maintainer Dry Formula, 2 Pounds, 12 Per Case $365.71 2 lbs. canister contains up to 100 treatments! 2 lbs. canister contains up to 100 treatments. To activate, mix warm water and BioOne dry (scoop provided) and pour down drain. For septic systems, mix entire canister with warm water and add... Add to Cart