What is the role of sanitisers in swimming pools?

Sanitisers play a crucial role in maintaining the safety and hygiene of swimming pools by eliminating harmful microorganisms such as bacteria, viruses, and parasites. These pathogens can pose significant health risks to swimmers if present in the water. The use of sanitisers like chlorine or bromine keeps the water clean and safe for recreational use by effectively breaking down contaminants and preventing the growth of harmful organisms.

While other options are important aspects of pool maintenance, they do not specifically pertain to the primary function of sanitisers. For example, balancing water hardness is essential for protecting pool surfaces and equipment, and controlling pH levels is vital for ensuring effective sanitisation and swimmer comfort. Enhancing water clarity is also key for aesthetic reasons and visibility in the pool. However, none of these functions directly relate to the primary purpose of sanitisers, which is to ensure the cleanliness and safety of the water by controlling microbial presence.