June 15, 2023

Which Chemicals Are Used in Pools, and Why?

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While everyone loves swimming in pools to cool off and relax during the summer, their maintenance should never be neglected. Adding the right chemicals to the water is an integral part of pool maintenance, and while those unfamiliar with swimming pools might find the process strange, it nevertheless makes the water safe to swim in. Let’s take a look at several of the important swimming pool chemicals that are needed to keep the pool clean, sanitized, and safe.


Chlorine is one of the most important pool chemicals and is primarily used to sanitize the pool water. It works by killing bacteria, viruses, and other microorganisms that can cause illnesses. Often sold in the form of chlorine tablets, chlorine also helps to keep the water clear and plays a crucial role in preventing algae growth. Algae spores can enter the pool through the air or on swimmers, and under the right conditions, they can grow and multiply rapidly, turning the pool water green and making surfaces slippery.


Oxidizers are used in the pool shocking process to break down unwanted materials and substances in the water. Over time, certain contaminants can build up and start to affect the overall water quality. They can cause the water to give off an unpleasant odor and even lead to skin and eye irritation for swimmers. The oxidation process not only helps to kill bacteria and other pathogens but also prevents the water from becoming cloudy. Pool shock is typically used as part of regular pool maintenance or after heavy use to restore the water’s natural chemistry. By shocking a swimming pool, you effectively reset the water — eliminating the contaminants and restoring the chlorine’s sanitizing power.


Algaecides are another essential pool chemical used to control and prevent the growth of algae in the pool. Algae blooms can cause pool surfaces to become slippery and the water to turn green. More importantly, they can clog pool equipment and interfere with the effectiveness of other pool chemicals. Using an algaecide as part of your pool cleaning chemicals can help keep your pool clean and safe.

pH Balancers

pH-balancing chemicals play a critical role in maintaining a well-balanced pool. The pH level of the pool water affects everything from the effectiveness of the chlorine to the comfort of the swimmers. If the pH level is too high or too low, it can cause pool stains, damage pool surfaces, and even lead to skin and eye irritation. For those reasons and more, using pH-balancing chemicals is a crucial part of pool maintenance.

Specialty Chemicals

In addition to the previously mentioned chemicals, there are other pool chemicals that you might need for your own pool, depending on its specific needs. These could include a phosphate remover to control algae growth or a shock treatment for when the water becomes particularly cloudy. Regardless of the specific pool supplies you need, remember that the goal is always to maintain a clean pool with balanced water chemistry.

Call Carlton Pools for Professional Pool Services

Homeowners in need of high-quality equipment for their pools can find what they’re looking for at Carlton Pools. We offer a wide selection of pool equipment, as well as renovation services for those interested in updating and improving the design of their backyard swimming pool. To learn more and schedule your service, reach out to Carlton Pools today. And Don’t Forget …

Carlton Pools retail stores offer free water testing!