The HTH Pool Care Shock_UltraÊ1_lb (ModelÊ52039) is a powerful, Cal_Hypo granular super_shock designed for weekly pool maintenance. This fast_dissolving, all_in_one formula rapidly boosts chlorine levels to destroy bacteria, algae, stains, and scale, while reducing eye and skin irritation and improving filtrationÑwithout adding cyanuric acid that can lead to chlorine lock.ÊFeaturing a visible blue action indicator to confirm activity, it restores crystal clarity within 24 hours and is compatible with vinyl_lined, concrete, and saltwater pools. Trusted by pool professionals and weekend maintenance routines alike, HTH Ultra Shock combines convenience and effectiveness in a single_use 1_lb package.

Highlights

• Powerful Cal-Hypo Super Shock Ð Fast-acting formula eliminates bacteria, algae, scale, and stains in just 24 hours.

• No Cyanuric Acid Added Ð Prevents chlorine lock by avoiding stabilizer buildup, ensuring consistent sanitation.

• Visible Blue Action Indicator Ð Confirms active treatment is working with easy-to-see color signal during use.

• Safe for All Pool Surfaces Ð Compatible with vinyl-lined, concrete, and saltwater pools for flexible application.

• 1 lb Single-Dose Convenience Ð Ideal for weekly pool maintenance, trusted by homeowners and pool service pros alike.

How To Use
HTHª Shock: Pool Chlorine Shock
1. Add Directly To Water Or Skimmer
Follow the on-pack instructions according to your pool size.
2. Repeat Weekly
For best results, use HTHª Shock as part of your weekly pool care routine to keep free available chlorine levels between 1 and 4ppm.