What is a common characteristic of an ineffective pool disinfectant?

An ineffective pool disinfectant often leads to foul odor and cloudy water. This occurs because the disinfectant is not effectively killing bacteria and contaminants, resulting in organic material accumulating in the water. When the water lacks sufficient sanitization, it can become murky due to the growth of microorganisms and suspended particles that are not being neutralized. Additionally, a foul odor is typically associated with the breakdown of chloramines, which are byproducts of chlorine reacting with organic matter rather than effectively disinfecting the water. These indicators—cloudiness and unpleasant smells—signal that the sanitizer is not working as it should, prompting the need for modifications in the pool's disinfection routine.