In hot humid weather green mold can form very quickly in your birdbaths. It is a good idea to monitor them frequently. I have found that the Clorox Clean-Up® product works quite well as a cleaning agent to remove green mold from birdbaths. I empty the birdbaths that need cleaning and spray Clorox Cleanup into them. Wait a few seconds and then wipe the residue from the bottoms of the birdbaths with a paper towel. Blue shop towels work very well for this purpose. Rinse the birdbaths thoroughly with clean water and refill them.
Birdbath with green mold — 07/30/2008
Birdbath cleaned with Clorox Clean-Up® — 07/30/2008