Check the listing for details. Microbe-Lift Birdbaths Water Clean & Clear 4 oz (118 ml). Condition: New. Listed at 8.99 USD. Keeps Birdbaths Water Clean & Clear Specially Formulated for Birdbaths Inhabited by Birds, Small Fish, Frogs, etc. Prevents organic and inorganic contaminants from forming (i.e. crusty white scale deposits, iron, copper and hard water stains). Uses two unique proprietary technologies: One system helps to prevent the buildup of stains and mineral deposits on the birdbath or fountain surface. The second system uses bio-enzymatic activity to keep water clear and free from the organic debris that can make the water cloudy.Helps keep birdbath water clearNatural & Safe Biodegradable and Environmentally Friendly. Safe for Humans and Pets!Prevents organic and inorganic contaminants from forming (i.e. crusty white scale deposits, iron, copper and hard water stains).Keeps Birdbaths Water Clean & Clear Specially Formulated for Birdbaths Inhabited by Birds, Small Fish, Frogs, etc.4 oz. (10BBC4) for 17 treatments.