Therma-Swim Liquid Solar Cover, 4901

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Reduce heat loss in your pool this summer with the Therma Swim Liquid Pool Cover! Easy to use and unnoticeable in water!

Product Features:

  • Reduces Pool Water Heat Loss
  • Lasts about a month
  • Easy to use- Simply pour into your pool
  • Compatible with all chemical systems
  • Environmentally friendly - biodegradable


  • One bottle per 400 square feet of pool surface area per month
  • Above grounds pools up to 21' round use 1 bottom, larger use 2
  • In ground pools up to 14'x28' use 1 bottle, larger pools use 2 per month



  • 5
    Good Product

    Posted by Alex on Aug 14 2021

    If you have a vinyl liner, make sure you adhere to the dosage... The first time, we added too much and the liner faded. Otherwise, a good product and helped keep the temperature overnight.

  • 5
    Therma Swim

    Posted by Jeff on Jun 15 2020

    We have been using Therma Swim on our pool for several years. It doesn't leave a noticable film on pool or feel it on our skin. With this, we never need a bulky solar cover for our pool. eztestpools had the best price we could find by far.