HTH™ Pool Care Shock is a fast-acting pool shock engineered to restore sparkle and confidence—without adding cyanuric acid (CYA).

• This Cal hypo swimming pool shock treatment boosts chlorine quickly to kill bacteria, fight algae, and clear cloudy water, helping you maintain balanced, inviting conditions after storms, parties, or heavy use.
• Designed for all pool types, this dependable pool shock treatment dissolves fast and won’t fade vinyl liners, so you can focus on the swim, not the stress.

Prepare for whatever lands in your water—HTH™ is here to help.

Product Benefits

Shock Weekly with Cal Hypo

Weekly pool shock treatment battles algae, bacteria, and cloudiness for confident, swim-ready results.

Quick-Dissolving Action

Rapid, even dispersion minimizes residue for a cleaner liner and balanced, consistent chlorination.

Chlorine Lock Defense

CYA-free formula helps prevent overstabilization, keeping sanitizer active when you need it most.

How to Use

Why You Should Use This Product: HTH Pool Care Shock is an effective calcium hypochlorite (cal‑hypo) shock designed for weekly pool treatment. It helps kill bacteria and algae, clears cloudy water, and restores visible water clarity without adding cyanuric acid (CYA), which can contribute to chlorine lock.

Before Use: Test pool water and adjust total alkalinity and pH before application. Always add chemicals separately and keep the pump running.

Application Instructions

• Use the entire contents of the bag once opened. Do not use this product in a floater or feeder.
• Add this product during evening hours while the pump is running. Broadcast evenly over a wide area of the pool, preferably in the deepest part.
• If any granules settle on the pool floor, brush to disperse until fully dissolved. Undissolved granules may bleach or damage pool surfaces.
• Do not enter the pool until free available chlorine levels return to 1–4 ppm.

Weekly Shock Treatment

• For routine pool maintenance or to address dull or cloudy water, shock the pool once per week.
• Add 1 bag of this product per 12,500 gallons of pool water.

Algae Control

For visible algae, apply the recommended shock dosage as close to algae growth as possible. Brush algae areas immediately after treatment and repeat shock treatment if algae persists.

Ingredients

Active Ingredient:

Calcium Hypochlorite: 52%

Other Ingredients: 48%

Total: 100%