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- You Don't Need A Chemistry Degree To Maintain Hot Tubs
You Don't Need A Chemistry Degree To Maintain Hot Tubs
- By Christine OKelly
- Published 08/19/2009
- Home & Garden
Christine OKelly
View all articles by Christine OKellyEven if you already
own a pool, the water in a spa is a little different to maintain, but the same
general concepts apply. The biggest difference is the water temperature, since
hotter water is a better environment for bacteria and it will also open up the
pores on our skin, thus lowering our tolerance to these bacteria.
Simple Sanitation
Sanitizers for portable spas are similar to the ones
used in swimming pools. The most common types are chlorine and bromine. Adding
them to the water is a habit that must be followed in order to kill bacteria
inside the water. Test strips can be purchased to measure the sanitizer level
in the water; the strips are simple to use, typically they only need to be
dipped in the water and then they will change color according to the sanitizer
concentration.
A good level for
chlorine is between 1.5 and 3 and bromine 3 to 5. Higher numbers will leave out
an odor, and lower amounts will not effectively kill bacteria, so staying
within the above range is ideal.
Water Hardness
Just as calcium is
good for our bones, it is good for hot tub water as well, but only in the right
dose. Hard water, or a high amount of calcium and other minerals, will give the
water a cloudy appearance and will form scale in the tub and on the equipment.
Low hardness will actually harm the tub's pump by pulling out minerals from the
pump parts and into the water.
The ideal range is for
calcium is between 100 and 250 for acrylic hot tubs, and 250 to 450 for
plaster, which can be measured using test strips. Calcium can be added to water
with a booster product, but lowering calcium is more difficult. It is best to
fill hot tubs with water that has been run through a softener filter before it
fills the spa, more calcium can always be added if it is too low.
Perfecting pH
pH is a measure of
how acidic or basic the water is; acids are low in pH and bases are high in pH,
neutral water has a pH of 7. The ideal pH range for hot tubs is 7.2 to 7.8 and
can be measured with pH paper or electric meters. Lower pH means that the water
is acidic and will damage the spa and irate skin, and a higher pH will cloud
the water as well as irritating the skin. pH is changed by added a “pH Up” or
“pH Down” to get the value just right. It might take a few tries, but once you
get the handle on how the pH reacts to change, it will be easy to control.
That's it! In just a quick article you learned the basics of spa water chemistry without getting a four year degree.
