Peter, a blog follower, from southern California sent me this photo that he took of a fountain on is patio. He offered the following tip on how to clean a fountain to fight algae:
Awhile ago we were exchanging emails on fountains for your back patio. I told you that a little bleach to fight algae goes a lonnnnnnng way.
This picture taken this morning is from ONE CAP of Clorox Regular I put in the fountain after hosing it out and refilling it yesterday. There was algae in it, so I added bleach to kill the last of it off after putting fresh water in. The bleach is reacting with the remaining algae and sudsing. I’ve read that using Clorox HE, Clorox Smart, etc creates even more suds. Since the birds love the fountain, I try to keep bleach and suds to a minimum.