A hot tub is like a community bath being shared by two or three people at a time. Thus pathogens, bacteria and even disease can be transmitted in a hot tub pool. Just one person can contaminate a hot tub.
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Although a hot tub can be cleaned of germs, the biggest problem is the heat of a hot tub that neutralizes the disinfecting power of chemicals which then need to be replaced frequently. Health authorities state that a hot tub should be disinfected every hour when in heavy use. Chlorine content should be 2-4ppm, bromine 4-6ppm and pH level 7.2-7.8. Slimy bacteria should also be scrubbed off the surface of hot tubs.
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Chlorine in a hot tub gets reduced by items like sunscreen, sweat and skin care products, urine and skin cells also react with chlorine forming chloramines a known skin and eye irritant. The ideal practice is to shower before entering a hot tub.
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