Final answer:
Commercial strength ammonia solution is used to detect small gaseous leaks in and around a chlorinator due to the formation of visible white smoke from the reaction between ammonia and chlorine.
Step-by-step explanation:
Small gaseous leaks in and around a chlorinator can be detected by the use of commercial strength ammonia solution. When ammonia comes into contact with chlorine gas, it forms a visible white smoke due to the formation of chloramine vapors which are a reaction product of ammonia and chlorine. This provides a simple and effective way to detect chlorine gas leaks. Other common methods for detecting chlorine include chlorine test strips, which specifically measure the presence of chlorine in a solution, and sulfur sticks, which emit a white smoke when they come into contact with chlorine gas, although they are generally used for larger leaks.