Which Chemicals Should You Use to Disinfect Your Hot Tub?

Written by 
Peter Smith
peter smith
Peter is an inflatable hot tub enthusiast, reviewing and testing hot tubs since 2014.
June 8, 2020

Much as inflatable hot tubs are a nice thing to have in a family house, their maintenance is also very important.

If you decide to disinfect your tub by yourself, you are likely to be faced with the dilemma of choosing which chemical is the right one to use for your tub. After that, you need to decide concentration levels of these chemicals in your tub.

In this article, I will be guiding you on which chemical is the right choice for your tub and how you can make use of this chemical without causing any injury to either yourself or any member of your household.

What are chemicals good for?

Why The Use Of Chemicals?

When you or any other person in your household enters into the tub, knowingly or not, you deposit what can be called body materials. These body materials include lotions, dead skin particles, oils, etc.

These chemicals are used to clean up those body materials.


In applying chemicals, you have to understand the concentrations of the chemical you intend to apply. This is measured by what is known as Ph value.

The reason why you need to understand Ph values are;

  • To avoid skin irritation;
  • To avoid mineral scaling on the tub which can lead to corrosion of the metal parts of the tub

Scientifically Ph is defined as the degree of hydrogen ion concentration in water. If the Ph value is less than 7, then the water is said to be acidic. If Ph value is greater than 7, water is basic. At a Ph value of 7, water is neutral.

The Ph value of 7 is what you need to strive for so that you can avoid skin irritation or corrosion of the metal parts of your tub.

Skin irritation is caused by water with a Ph level of less than 7. While mineral scaling is caused by water that has a Ph value greater than 7.

clean water

The Main Types of Chemicals

Different kinds of chemicals

These are:

  • Chlorine and
  • Bromine
  • Others are biguanide and shock oxidizers.


It has been proven by experts as well as consumers worldwide that chlorine is the most effective tub chemical. This is because of chlorine

  • Is Less expensive compared with its major rival bromine
  • Produces the right scent if you apply it the right amounts

Despite these obvious advantages, chlorine has the following disadvantages…

  • Do not use chlorine if your tub becomes very dirty before you decide to disinfect it. This is because you will need to add a larger amount of chlorine than usual, which will cause an unwelcome, offensive smell to you and or your visitors


Bromine works as well as chlorine but it is more expensive. However, if you need a chemical that can work at very high temperatures without losing its scent, bromine is a better choice than chlorine.


This is a non-chlorine alternative, but it provides less aroma than either of bromine or chlorine.

Shock Oxidizers

These have been applied to remove body materials. These body materials include lotions, dead skin particles, oils etc. they have been proven to work very well when applied for this purpose.

It has to be noted that scientists are constantly developing newer and better alternatives to chlorine and the others, but as of today, chlorine is your best choice.

Keep enjoying your tub

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