Poultry & Game Bird Waterer Protector contains natural enzymes, which safely break down organic contaminants and residue. Enzyme have the power to break apart proteins, fats, etc. & make them absorbable. Essential enzymes provide birds with added digestive enzymes for better food absorbtion. Clean water is essential in maintaining healthy birds. This product is 99% organic & OMRI approved. Effective on both plastic & galvanized waterers.