The 380MDJ Microbiotic DOWN JOHN™ Sewage System Treatment is a once-a-year, 3-part septic tank treatment kit designed for anaerobic septic systems to help restore and maintain healthy tank performance. The 12 oz kit includes three flushable packs that are added on three consecutive days, making treatment simple—Day 1 targets household chemicals, Day 2 reintroduces beneficial bacteria, and Day 3 breaks down grease buildup to support ongoing waste digestion.
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