HTH™ Pool Care Shock Advanced

Pool Shock for Algae

Skip to product information

HTH™ Pool Care Shock Advanced

Pool Shock for Algae

HTH™ Shock Advanced pool shock helps you take on cloudy, unbalanced water with confidence.

  • This powerful 4-in-1 swimming pool shock treatment kills bacteria, prevents algae, reduces chlorine odor, and restores clarity fast.
  • With Cal Hypo technology, it delivers a sparkling clean pool without adding cyanuric acid, so you can enjoy a healthy, inviting swim all season long.
  • For best results, shock weekly with HTH™ Shock Advanced.

HTH™ is here to help giving you the confidence to keep your water clear, safe, and always swim ready. You're all clear with HTH™.  

Product Benefits

Powerful 4-in-1 Formula

Kills bacteria, prevents algae, reduces odor, and restores clarity with advanced HTH chemistry.

Crystal Clear Results

This Cal hypo powered swimming pool shock treatment clears cloudy water in just 24 hours for sparkling confidence.

Shock Weekly with Cal Hypo

For best results, shock weekly with HTH™ Cal Hypo Shock Advanced.

App-Powered Clarity

Combine with HTH™ Test to Swim™ to remove guesswork, optimize dosing, and maintain sparkling clarity.

How to Use

How to Use

Why You Should Use This Product: Shock Advanced is a fast‑acting, multi‑functional calcium hypochlorite (cal‑hypo) shock that kills bacteria and algae, clears cloudy water, and helps restore visible water clarity. It does not add cyanuric acid (CYA), helping prevent chlorine lock and overstabilization.

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 with the filter pump 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 oxidation and to help prevent water problems, shock the pool at least once per week.

Add 1 lb (1 bag) of this product per 13,500 gallons of pool water.

Ingredients

Ingredients

Active Ingredient:

Calcium Hypochlorite: 56.44%

Other Ingredients: 43.56%

Total: 100.00%

Safety, Storage, and Disposal

Safety, Storage & Label Guidance

Use this product only as directed. Avoid contact with eyes and skin, and avoid breathing dust.

Wear protective eyewear and wash hands thoroughly after handling.

Do not mix this product with other chemicals.

Store in a cool, dry, well‑ventilated area away from heat or open flame.

For complete safety precautions, first aid instructions, and disposal information, always refer to the product label.

Reviews

 

Quick Pool Tips

  • Always read product label directions prior to using and use only as directed

  • Always add chemicals to pool water, never the other way around

  • Never add chemicals to pool water when people are in the pool

  • Warning symbol with a triangle and exclamation mark on a blue background

    Never mix products together

  • Always store pool products in a cool, dry location and out of direct sunlight