How to Test Spa Water for Calcium Levels

Before water enters the pipes and is pumped into your spa (which is often referred to as a Jacuzzi), it picks up bits of calcium in the ground. A lot of calcium can make the water hard. Cleaning solutions that you use to keep your spa clean, instead of dissolving in the water, will combine with the high calcium content to create a film or curd. Low calcium levels can cause the water in the spa to become cloudy. There are tests you can perform to determine the calcium level in your spa.

Calcium test kit

Instructions

- 1
  Purchase a calcium test kit. These test kits are available online or at some home improvement stores.
- 2
  Put some of the spa water into the sample tube up to the fill line, or add 5 ml (0.17 oz.) using the syringe.
- 3
  Dip one test strip into the spa. Shake off the excess liquid from the strip and place it aside with the test field side facing up. Some test kits don't use strips; instead they test the calcium level of the water in the sample tube.
- 4
  Add the specified amount of the provided Calcium 1 or A into the test tube, and swirl the tube around for 30 seconds to dissolve it.
- 5
  Add the specified amount of the provided Calcium 2 or B into the test tube, and swirl the tube around for 30 seconds to dissolve it.
- 6
  Insert the test strip again into the test tube, if applicable. Hold it in place for 45 seconds.
- 7
  Look at the color chart included with the test kit, and compare the color of the strip or test tube sample with the colors on the chart. If the test reveals the calcium is too high, use a calcium hardness reducer. If the levels are too low, add calcium chloride. Both products are available at pool supply stores.

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