Maintaining your Chilly GOAT Cold Tub

Water Care

Chilly GOAT Cold Tubs have been designed with simplicity and ease of maintenance in mind. With a built-in water care system, including UV and filter, taking care of your cold tub has never been easier. 

The cold water temperature also means that you'll spend less time on maintenance compared to traditional hot tubs. 

In this guide, we will walk you through the initial start-up process and provide you with tips on how to maintain your cold tub effectively.

Best practices

  • Always shower before using the cold tub so detergents, lotions, and body oils do not affect water quality.
  • Maintain proper PH and sanitizer levels for safe use.
  • Always add chemicals to the water, not water to the chemicals.
  • Add chlorine and other chemicals in 1 teaspoon increments.
  • Always store chemicals according to the manufacturer’s instructions.
  • Keep chemicals out of the reach of children.

Cold tub chemicals

Your Chilly GOAT Cold Tub comes with a chemical start-up kit. In the kit, you’ll find:

  • Balance UP, to increase pH and alkalinity
  • Balance DOWN, to decrease pH and alkalinity
  • Sanitize, chlorine granules that you add directly to the water
  • Refresh, a non-chlorine oxidizer

Initial cold tub start-up

Note: Wait at least 24 hours after placing your Chilly GOAT before beginning start-up.

Filling your cold tub. Attach a pre-filter to your garden hose. This pre-filter, which is available on the Chilly GOAT website, will help remove minerals from your source water to make water care easier.

Be sure to let the water flow through the filter housing. This step will help you prevent air locks.

Install the filter. Turn the filter clockwise, mindful not overtighten. Slide on the filter housing cover.

Connect to power. Plug the unit into an electrical outlet and turn on your cold tub.


Set the water temperature. Once you set the temperature, the water will begin to move through the chiller. Once water flow has been established, you can use the provided chemical kit to balance the water.

Cold tub chemical start-up

Use the test kit and test pH level. Be sure to carefully read and follow the kit instructions for accuracy.

Based on the results of the pH test, use Cold Tub Balance Up or Cold Tub Balance Down to adjust the Ph of the water. The recommended pH range is between 7.2 – 7.6.   Use the convenient 1 teaspoon scoop to add the chemicals. 

Allow the chemicals to circulate in the water for 15 minutes, then re-test.  Continue this process until the correct pHlevel is achieved.

Once the correct pH level has been achieved, add 1 teaspoon of Cold Tub Sanitizer to clean and disinfect the water of the cold tub.

Allow the sanitizer to circulate in the water for 15 minutes. Test the water to see if the sanitizer is within range. The proper chlorine level is 1 to 3 ppm.

If the sanitizer level is too low, add additional sanitizer 1 teaspoon at a time until proper level is achieved.  Be sure to wait 15 minutes before retesting the water and adding additional sanitizer.

REMEMBER:  Only add chemicals 1 teaspoon at a time — a little goes a long way!

Wait at least two hours before using your Michael Phelps Chilly GOAT Cold Tub by Master Spas.