mycobacterium avium complex (MAC) . At temperatures above 84 degrees Fahrenheit, the level at which many if not most tubs operate, chlorine loses its much of its disinfectant properties, especially if proper sanitizing procedures are not followed, and MAC can flourish. The bubbles and steam rising from the spa or hot tub create an aerosol through which MAC readily enters the lungs by normal breathing or inhalation.  It should be noted that it is currently unclear from the reports whether this condition is an infection or hypersensitivity pneumonitis.

The Mayo Clinic researchers also noted that all of the reported cases of "hot tub lung" have been associated with INDOOR spas or hot tubs at a personal residence.

The condition is most likely to occur when spa & hot tub owners DO NOT physically clean the tubs (drain, clean, rinse, refill), chemically clean or change the filter(s) (use SpaGuard® Filter Cleaner) as often as is recommended and/or do not follow a proper sanitizing procedure.

Perform the following procedure to treat  the infected spa or hot tub:

1. Drain the spa and refill just above the jets.
   
2. Remove the filter and soak in a solution of chlorine and water during treatment. (2 Tbsp Dry chlorinating concentrate per 5 gallons of water)
   
3. Shock with four times the normal dose of Stabilized Chlorinating Granules.
   
4. Turn on the jets and circulate for 2 - 3 hours. The bacterial growth usually builds up in the lines, so it is necessary to flush them thoroughly.
   
5. Drain the spa again and refill with fresh water.
   
6. Rinse and replace the filter.
   
7. Rebalance spa (pH, total alkalinity & calcium hardness) and shock. Do not enter the spa until sanitizer level drops below 4.0 ppm.
   
8. As an additional precaution, Par Pool & Spa STRONGLY RECOMMENDS cleaning the underside of the spa or hot tub insulating cover with a hard-surface disinfectant such as Pursue® Broad Spectrum Disinfectant Deodorizer or Lysol® following all label instructions for disinfecting.
   

For further information, please visit our Knowledge Base

A side note:  Products such as Soft Soak® Sanitizer and Soft Swim® "B"  do not lose their effectiveness as water temperature increases.

Information found in "Mayo Clinic Proceedings," November 2002

For further information & treatment regarding Chloramines, visit our Spa Care Knowledge Base

If you still need help, here's how to reach us:

Telephone (during store hours): Stratford  203-377-0100
                                             
FAX: (24 hrs) 203-375-7787
Email: techhelp@parpool-spa.com 

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