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Can outdoor hot tubs and jacuzzi’s grow mold?
Question:
I’m wondering if HOT tubs or Jacuzzi’s outdoors can fester with mold underneath a deck or foundation…? I smell a musty smell even tho it’s outside… Thanks.
Answer:
In our experience, any environment where humidity is present and moisture can sneak in will lend itself to mold growth. The heat generated from the unit can cause condensation which, in your case, may be leading to mold growth under the deck or foundation.
Jonathan Wold
MoldBlogger.com

There is water purifier that we produce that will kill all the bacteria in the hot tub. It produces high allotropes of Oxygen, O4 to O15 which in injected into the water. This will eliminate the need to use Chlorine. This will also give a nice therapeutic effect as the Oxygen will be very refreshing.
Since your hot tub is outside our air purifiers will not be able to kill the mold, as the high levels of Oxygen produced by our machine would be diffused outdoors. Inside it would kill Mold/Mildew or any bacteria and eliminate odors. You will need to disinfect the under side of the tub and deck. You can use the water produced by our water purified (since this is sanitized and has Active Oxygen) and spray it or use a more toxic solution like Chlorine. You can learn more about our products at http://www.EPT-LLC.com
Chuck on January 6th, 2009There is water purifier that we produce that will kill all the bacteria in the hot tub. It produces high allotropes of Oxygen, O4 to O15 which in injected into the water. This will eliminate the need to use Chlorine. This will also give a nice therapeutic effect as the Oxygen will be very refreshing.
Since your hot tub is outside our air purifiers will not be able to kill the mold, as the high levels of Oxygen produced by our machine would be diffused outdoors. Inside it would kill Mold/Mildew or any bacteria and eliminate odors. You will need to disinfect the under side of the tub and deck. You can use the water produced by our water purified (since this is sanitized and has Active Oxygen) and spray it or use a more toxic solution like Chlorine. You can learn more about our products at http://www.EPT-LLC.com
Enviromental Protection Technologies on January 7th, 2009Why does the inside of my hot tub cover look like there’s black mold growing on it?
Amy on June 10th, 2009There are little rpund spots of black mold growing under the water (on the bench/seating surface of my hot tub…
karen bragg on July 31st, 2009i have never seen such…what can I use to kill the mold and prevent future mold? Thank you for your help/advice. Sincerly, Karen Bragg
We have the same problem! How did you fix it?
V Candow on March 20th, 2010