If your pond is occasionally troubled by algae blooms or accumulated organic debris, here’s a way to quickly restore its natural beauty. Blast is a proprietary blend of beneficial bacteria that breaks down the organic matter that causes cloudy water, transforming your pond from slimy mess to clear and fresh. The ingredients are nontoxic and safe for fish, pets and aquatic plants. Blast 2,500 Gallon is sized for smaller ponds and water features. It contains five packs that each treat a 2500-gallon pond. They work best in conjunction with a Submersible Dispenser (sold separately) for long-lasting protection.