Hydrogen Peroxide for Hot Tubs

Hydrogen peroxide is a chemical made up of two molecules of hydrogen and two of oxygen. At normal room temperature it is a colorless liquid. It is unstable and decomposes quickly in oxygen and water by releasing heat.

Using hydrogen peroxide as a water disinfectant

When hydrogen peroxide comes into contact with water, it releases one oxygen molecule. This single oxygen molecule is a disinfecting agent. It causes the chemical to work as a disinfectant.

Technical grade 35 percent solution

The concentration for using hydrogen peroxide in hot tubs is 35 percent. When adding to water it's recommended to wear safety glasses or goggles and rubber gloves.

Water condition

In order for the hydrogen peroxide treatments to work, the water must be chlorinated. The small amount of chlorine in water systems is sufficient. If the water has high concentrations of iron or organics, the hydrogen peroxide breaks down quicker. Monitoring the water chemistry frequently is recommended.

Testing

Plastic strips, similar to pH strips, are available to test the concentration of hydrogen peroxide in the hot tub. Put the strip in the water according to the instructions and compare to a color chart. This will indicate what needs to be done.

Poison

Hydrogen peroxide is an acid, and exposure to hydrogen peroxide can cause irritation to the eyes and respiratory system. Hydrogen peroxide is a poison too, and eye exposure to a 3 percent solution may cause irritation. At that dilution, it rarely causes severe injury, though.

References

• Ozone lab
• The solar biz
• Food grade hydrogen peroxide