Our Drain Cleaner and Maintainer is a powerful enzyme treatment, specially developed to eat away at tough drain blockages. It releases millions of beneficial bacteria to speed up the biodegradation of food, grease and organic waste to eliminate blockages and smells. This non-corrosive formula is safe on all plumbing, in septic tanks and aquatic life. To ensure drains are well maintained, dissolve on tablet monthly into each problematic drain to stop blockages recurring.