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 Toscano water features safe for plants, birds and wildlife (except fish), and eliminate mosquitos.Details:8 fl. oz.Eliminates and prevents algae growthNon-foaming and non-stainingKeeps water crystal clearTreats up to 20,000 U.S. gallons