How to Use Bromine or Chlorine in a Hot Tub

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Bromine and chlorine are the two most common chemicals used to sanitize a hot tub. These chemicals help keep the water clear and clean, and prevent the growth of bacteria and algae. You can use only one of these chemicals in your hot tub at a time. Most hot tub owners use a floating dispenser to distribute the chemicals throughout the water. Weekly water maintenance checks are necessary to ensure that chemical levels are appropriate for your hot tub.

Things You'll Need

  • Water test kit
  • Bromine or chlorine
  • Floating dispenser

Bromine

Test your hot tub water with a test kit. Follow the manufacturer’s instructions to ensure accurate bromine readings.

Compare your hot tub water results with the chart provided by the manufacturer. Bromine levels should be from 4.0 to 6.0 ppm (parts per million).

Add bromine tablets or granules to the hot tub based on the manufacturer’s recommendations. Place the required bromine into the dispenser, and place the dispenser in the water.

Chlorine

Test your hot tub water with a test kit. Follow the manufacturer’s instructions to ensure accurate chlorine readings.

Compare your hot tub water results with the chart provided by the manufacturer. Chlorine levels should be from 1.0 to 3.0 ppm (parts per million).

Add chlorine tablets or granules to the hot tub based on the manufacturer’s recommendations. Place the required chlorine into the dispenser, and place the dispenser in the water.

Tips & Warnings

  • Always check the water's pH and alkalinity levels along with bromine or chlorine. These chemical levels can negatively affect bromine or chlorine levels in the hot tub.
  • Never mix spa chemicals prior to using them in the hot tub.
  • Never use bromine and chlorine together.

References

  • “The Ultimate Pool Maintenance Manual: Spas, Pools, Hot Tubs, Rockscapes and Other Water Features”; Terry Tamminen; 2000
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