Remember to use only a “algae-fix” type algaecide for controlling fountain algae.
Many people use bleach or chlorine to control algae in fountains but the main issue with that is bird safety. Many birds use ornamental fountains in order to bathe and drink. bleach and chlorine diluted water will kill birds. Algae-fix or related products are “fish and bird safe” and are available at most pet stores. Save the birdies!!!