Ensures naturally clear water. Safe for birds, pets and Wildlife. Prevents stains, sludge, mineral deposits and organic contamination. Non-toxic all natural Enzymes. Bird bath protector is not a chemical and needs time to work. Extremely dirty birdbaths may take several weeks to clean. For best results, start with a clean bird bath. Note that this product is safe. No restrictions for wildlife when used as directed. Non-toxic, biodegradable, bacteria-free, food-grade enzymes.