Leisure Time Replenish - Spa / Hot Tub Shock 2 LB 2-Pack (45310A)





The Leisure Time Replenish Spa/Hot Tub Shock in a 2-pound 2-pack (often identified as ZCA) is a specially formulated shock treatment designed for use in spas and hot tubs. Manufactured by Leisure Time, a trusted name in spa and hot tub water care, this product offers a convenient and effective solution for maintaining water clarity, sanitization, and overall water quality in your spa or hot tub.

Key Features:

  • Shock Treatment: Replenish is a powerful shock treatment designed to quickly and effectively address common water issues in spas and hot tubs.
  • Oxidizes Contaminants: It acts as an oxidizer, breaking down and eliminating organic and inorganic contaminants, including lotions, oils, perspiration, and other impurities that can accumulate in spa water.
  • Chlorine-Free: Replenish is chlorine-free, making it suitable for use with chlorine, bromine, and other sanitizers.
  • Enhances Water Clarity: Regular use of this shock helps improve water clarity, ensuring that your spa or hot tub water remains inviting and crystal clear.
  • Easy Application: The 2-pound packaging is convenient for dosage control and application in spas and hot tubs.
  • Versatile Use: Suitable for use in a variety of spa and hot tub types and sizes.
  • Compatible with Different Water Types: Can be used in both freshwater and saltwater spas and hot tubs.


  1. Ensure that your spa or hot tub water is balanced, with appropriate pH and alkalinity levels.
  2. Calculate the required dosage based on your water volume and the specific instructions on the product packaging.
  3. Add the recommended amount of Leisure Time Replenish shock directly to your spa or hot tub water.
  4. Allow the water to circulate for proper distribution and filtration.
  5. Test the water chemistry after treatment to ensure it meets the desired parameters.
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