HTH™ Pool Care Shock Ultra is an advanced pool shock that makes weekly upkeep simple and certain.

• This all-in-1 Cal-hypo swimming pool shock treatment boosts chlorine fast, fights bacteria and algae, and helps reduce eye and skin irritation without adding cyanuric acid (CYA) that can lead to chlorine lock.
• It also helps prevent stain and scale, improves filtration, and softens water for a visibly brilliant sparkle within 24 hours.
• Safe for vinyl liners and ideal for all pool types, this dependable pool shock treatment keeps your routine strong and your water confidently clear.