All swimming pool owners should be aware of what is involved in water disinfection. It is one of the ways that they can ensure that the pool is safe to swim in for everyone. Microorganisms, when it is not regulated can pollute the water in your swimming pool. Every time a swimmer enters the water, 1.000.000 to 1.000.000.000 microorganisms are added to what is already in the water. Imagine if your child just had a pool party – how dirty did the water just get?

The thing is, disinfecting your pool can admittedly be confusing. You have to test the pool water and from there, determine how much chemicals will be used to make it safe to swim in. If you are not careful, it could end up making the water harmful for your family.

When you are disinfecting your pool, you have to consider a couple of things.

First of all, you need to know the compatibility of the chemicals with the water supply. Not only that, you have to consider the size of the pool, how many times people bathe in it, and the way you manage and maintain the pool.

Your primary concern, of course, is the safety of your family. It should not be harmful or irritating to the skin. At the same time, you have to make sure that they amount of chemicals that you will place will do their job.

Obviously, the primary job is to kill the pathogenic microorganisms that can make the pool water unsafe. The chemical should be able to actively accomplish this for a long time. Because of the way the water is stored and used, there will always be pathogenic microorganisms and pollutants that are constantly introduced into the water. You want to ensure that the chemicals used for the pool water disinfection will be active in the pool itself. You should be able to measure it so you can increase or decrease the concentration as it is needed.

Now that these conditions are clear, let us go into your choices. Most of the chemicals used in the water disinfection are actually chlorine-based.

One of the chemicals being used is sodium hypochlorite. It is used to oxidize and disinfect the water in a swimming pool. After it is added, the pH value in the water rises. Once it does, you have to add acid to lower the pH level.

This is why some pool owners opt to use chlorine. It is also added as a disinfectant and oxidizer as long as the pH value of the water is 6,5. Chlorine can be added in two forms: hypochlorite (OCI) or hypochlorous (HOCI).

The level of chlorine to be added to the water should be just right. For the available chlorine in the water, the concentration should be set to 0,5 to 1,5 milligram for every liter of water. When you use cyanic acid (stabilizer), it should be between 2,0 and 5,0 mg/l. For outdoor pools and indoor pools smaller than 20 sqm, the maximum level should bet 5,0 mg/l.

Take note of these levels because if you add too much, it will cause irritation specifically to the eye and mucous membrane. But if you add too little, you might be in danger of water-borne illnesses.

It is also important to consider the pH value in the water because it can affect the chlorine that you will add. It should be between 6,8 and 7,8. With a pH level of 7,0, the chlorine is 70%. But if the pH level is high at 8,0, the chlorine goes down to 20%. This is why you should measure the pH value of the water – if possible, on a daily basis.

Finally, consider the water and air temperature in the pool because if it is too high, that can influence the water disinfection chemicals and its activity in the pool. If you used sodium hypochlorite and you added acid to decrease the pH value of the water, that results in the formation of chlorine gas. If it is not removed, it can cause harm to humans and corrode some materials in your pool.