Eliminate algae and keep the water in your ponds and your Design Toscano fountains sparkling clean with this easy solution! Simply add a few drops from this generous 8-ounce bottle of concentrate to retain glistening clear water, keep your indoor and outdoor water features safe for plants, birds, and wildlife (except fish), and eliminate mosquitoes. For minimal maintenance without scrubbing, choose this easy addition to enjoy clean birdbaths and glistening water music throughout the seasons! Use as directed. 8 oz. (237 ml.)