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The Hot Tub Doctor
The No-Chlor Program
Relying on nature to help

Today’s hot tubs are by far more advanced than those manufactured just a few short years ago. With
technology comes advances in water chemistry as well. There are more and more people getting away from
the heavy reliance of chemicals in their hot tubs. Whether it be that someone in their family is hyper-sensitive
to a particular chemical or they just don’t want to have their children exposed to any more chemicals than
they have to. We have all heard of the self-cleaning ovens, yet not many people are aware that their does exist
a few hot tubs that are almost completely self-cleaning. For this to exist there must be a few well defined
guidelines for this to occur.

(1) There must be some sort of corona discharge ozone system. These typically emit 75% more ozone into the
tub than a standard ozone system. Plus they tend to be more reliable in the long run.

(2) The owner must utilize a mineral system to work in conjunction with the ozone generator. This can be in
the form of the Spa Frog© or Nature 2® mineral system. There are others, these two seem to be called for
more often. These also make the water feel softer as well as reduce the odors usually associated with hot tub
water.

(3) The filtration system should filter somewhere in the range of 1-4 microns. Usually these are labeled as
anti-bacterial and/or anti-microbial filters. Ask your retailer if the tub you own has this available.

(4) The system should have either 24 hour circulation pumps or give the user the option to set their own
filtration cycles.

(5) The only chemical that will be used is non-chlorine shock or otherwise known as potassium
monopersulfate. Shock should be weekly to oxidize organic contaminants and increase water clarity.
Typically you’ll used somewhere between 1 tablespoon up to 1/4 cup based on a 500 gallon hot tub, naturally
depending on bather load as well.

(6) Weekly we still recommend using some form of scale formation and stain preventative treatment in your
hot tub. For 500 gallons you should use 1 to 2 ounces, be sure to read the spa manufacturers
recommendations however