A patented blend of powerful enzymes can break down grease, fats, oils, soap and food waste to keep the sink clean. SAFE FOR ALL SEPTIC SYSTEMS Compatible with all septic systems. Does not damage any tank components or parts. Attacks the regularly flushed water with unique cleaning solution that prevents the future formation of undesirable stains and scum. Combats pesky stains caused by hard water and releases concentrated cleaning solution every time you flush. This includes removing rust stains, and more.