You should be enjoying your outdoor spaces, as well as the antics of your feathered friends, instead of spending it scrubbing and cleaning your backyard birdbath. Our new Birdbath Protector cleans, protects and prevents mineral buildup, stains, sludge and organic contamination with just one capful per week. Simply add it to your birdbath water and mix thoroughly. The all-natural enzymes will do the work for you, though very dirty birdbaths may take several weeks to come completely clean. For best results, we suggest you start with a clean birdbath. Non-toxic, biodegradable and absolutely safe for wildlife when used as directed. 8 fl. oz.