Regal Dy-Chlor II is a high-quality swimming pool shock treatment designed to quickly and effectively sanitize your pool water. Its fast-dissolving formula makes it easy to use, and it's ideal for regular maintenance or when you need to quickly clear up cloudy or green water. Regal Dy-Chlor II helps eliminate bacteria, algae, and other contaminants, leaving your pool water clean, clear, and ready for swimming.