Eliminating Odor or Fuming

All bodies of water release gasses. Hot tubs will release more fumes than most because the water is heated. Since most spas stay covered most of the time, this adds up to a fairly high level of harmless gases under the spa cover. When the cover is opened, these fumes are released and will sometimes cause throat and eye irritation and coughing.

To prevent a heavy odor, ventilate the spa room well if indoors. Periodically remove cover to release gases and prevent extensive buildup.

If the odor is musty or unpleasant, leave the cover off for a few hours a day if possible. Clean the cover periodically with a disinfectant.

Note: This information is intended for a residential spa with average use. It is not designed for public, commercial, or semi-public spas. If your hot tub is used more than three times per week, you should check and make chemical additions more often than suggested.