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Spa Chemicals

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Spa Chemicals

At PoolSupplies.com, we aim to make spa maintenance easy. This one-stop shop has everything you need to keep your spa or hot tub clean, balanced, and well-maintained in one place. Keeping your hot tub clean has never been so easy.

What Chemicals Are Needed For A Hot Tub?

Several key chemicals are required to keep your hot tub clean and safe for swimming. These include:

For an in-depth deep dive into the chemicals needed, read our blog - How To Balance Pool Water.

How Do I Add Chemicals To A Hot Tub?

The first thing that you need to do is test your spa water (see below!) After you have your baseline readings, you can start adding your chemicals.

Heat your spa until it reaches 80° Fahrenheit to disperse the chemicals more effectively. Measure out your chemicals before adding them one at a time to the water. It’s important to add them in the right order to ensure maximum efficiency:

  1. Alkalinity and pH Increaser or Decreaser
  2. Sanitizer
  3. Calcium Hardness Increaser

Wait at least 20 minutes between adding chemicals, keeping the jets running, and air valves off. Keep the cover off your hot tub, and ensure your safety by using gloves, goggles, and a mask. Keep the chemicals separate before you add them to the tub.

How Should I Test My Spa’s Water?

You can test your spa water with either test strips or a liquid test kit. If you’re using bromine, ensure that whatever testing method you’re using can detect it. 

Should I Test My Spa For Metals?

We recommend testing your spa for metals monthly. If you have well water, it is recommended to test more frequently, as there is a higher likelihood of introducing metals into your spa. However, it is generally more important to maintain balanced chemical levels in your spa, which helps prevent the presence of metals. In case you detect metal levels in your spa, it is crucial to address the issue promptly by purchasing a metal remover such as Rx Clear® Metal Out to eliminate the metals.

How Often Should I Test My Spa’s Water?

It is recommended to test the chlorine/bromine, pH, and total alkalinity levels in your spa's water 2 to 3 times per week. This frequency should increase if there is a heavy bather load. The calcium hardness should be tested once a month, or more frequently if you have experienced previous issues with metals. Additionally, testing your water after making any adjustments is essential to determine their effectiveness. For example, if you added a pH-increasing substance, you should check if it raised the pH to the appropriate level. Conducting this test after allowing the chemicals to circulate for a few hours is advisable.

How Long After Adding Chemicals In A Hot Tub Can I Use It?

You should wait at least 30 minutes after adding chemicals to your spa before getting in - this gives enough time for the chemicals to disperse in the water and for the pH of the water to settle.

If you have any more questions about spa care, visit our dedicated Buyer’s Guide and FAQ's on spa chemicals.