HTH® Shock! Treatment, 5.5 lbs.

Shock treat your pool at least once a week to kill unwanted bacteria and algae and to give your pool the boost of chlorine it needs to keep your water clean and clear.

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About This Item

HTH® Shock! Treatment is the original swimming pool shock designed to boost chlorine levels and kill bacteria and algae for a clean, clear pool. This pool shock is great for all pool types and won’t fade your pool liner. Test and apply shock treatment directly to your swimming pool every week to keep free available chlorine levels between 1 and 4ppm for healthy swimming conditions.

  • Increases the chlorine level in swimming pool water
  • Kills bacteria and algae in swimming pools
  • Shock treatment effective for all swimming pool types including pools with liners and Gunite pools, and salt water pool systems
  • Won't fade liners
  • Test pool water and shock weekly to keep free available chlorine levels between 1 and 4 ppm
HTH Pools - Stay clear all summer long, with HTH, it's easy. Just right.

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Shock Your Pool for Crystal Clear Water in 24 Hours


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Boost Chlorine

Chlorine sanitizes your pool to remove bacteria and other hazardous contaminants to keep water clean. Use HTH® Shock! Treatment to restore chlorine levels that have been depleted by the sun, rain and heavy use.

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Kill Bacteria & Algae

Low chlorine levels, poor water circulation and warm weather can encourage bacteria and algae growth. Rid your pool of black algae, mustard algae and green algae and prevent regrowth by shocking your pool once a week. Don’t forget to brush the floor and walls of the pool.

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Keep Water Clear

The fast-dissolving formula found in HTH® shock treatments acts quickly to restore clarity to your water so you can be back in the swimming pool within 24 hours. Plus, the treatment won’t overstabilize your pool or fade your liners.


How to Use HTH® Shock! Treatment


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1. Test pH Levels

Dip an HTH® Multi-purpose 6-Way Test Strip (sold separately) into the water to measure total alkalinity, pH, free available chlorine (FAC), calcium hardness, and cyanuric acid (CYA) or stabilizer. Balance water, and adjust alkalinity and pH levels, where applicable.

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2. Apply Directly to Water

Before handling any chemicals, put on protective gloves and goggles. During evening hours and with the pump running, broadcast the HTH® Shock! Treatment evenly over a wide area in the deepest part of your pool.

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3. Wait & Test Chlorine Levels

If granules settle along the bottom of the pool, use a brush to disperse until granules are dissolved. Once free available chlorine levels are between 1 and 4 ppm, your pool is ready to use again.


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