HTH® Ultimate Shock! Treatment, 6 bags (1 lb. each)

HTH® Ultimate Shock! Treatment, 6 bags (1 lb. each), is a highly effective, 7-in-1 multi-purpose shock product that works fast to kill bacteria and algae and restore crystal clarity to pool water within 24 hours. It is convenient, easy to use, and won’t over-stabilize your pool. Finally, it provides Visible Blue Action, so you know it is working!


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About This Item

HTH® Ultimate Shock! Treatment delivers an incredible value with a 7-in-1 formula that increases chlorine levels, kills and prevents bacteria and algae, reduces eye and skin irritation, prevents stains from metals and prevents scale. HTH® makes pool care easy with a shock treatment that you can apply directly to the pool, and see crystal clear results in just 24 hours. This pool shock is ideal for all pool surfaces and won’t fade your vinyl pool liner. You can also use this swimming pool shock in your salt water pool for the same sparkling clear results.

  • Increases swimming pool chlorine levels
  • Kills and prevents bacteria and algae fast
  • See crystal clear results in 24 hours
  • Shock treatment effective for all swimming pool types including pools with liners and Gunite pools, and salt water pool systems
  • Ultimate Pool Shock Treatment is effective on all pool surfaces – won’t fade vinyl pool liners
  • 7-in-1 formula reduces eye irritation, prevents stains from metals, and prevents scale
  • Test pool water and shock weekly to keep free available chlorine levels between 1 and 4ppm
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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® Ultimate Shock! Treatment to restore chlorine levels that have been depleted by the sun, rain and heavy use.

HTH Pools - above ground pool with wrap around deck

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.

HTH Pools - girl swimming under water

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® Ultimate 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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