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Top Ten Spa Chemicals
The following list represents the basic selection of chemicals available
for effective spa maintenance.
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Sodium dichlor: Often
referred to as dichlor, this low-cost 100 percent soluble
chlorine sanitizer produces no
residual effect on acrylic or fiberglass shells.
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Bromine: A sanitizer
available in 1 inch tablets,
bromine stabilizes at a higher pH than dichlor (chlorine), resist
the effects of ultra-violet rays, and controls odor problems sometimes
associated with chlorine.
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Potassium monopersulphate:
This increasingly poplar oxidizing agent or shock treatment activates
the chemical action of conventional and alternative sanitizers.
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Sequestrian agents:
These chemical mixtures prevent
metals present in the water from coagulating, a process that can
stain the shell of a spa and corrode the equipment. Some sequestrian
agents can remove stains from fiberglass shells in conjunction with
brushing.
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 Clarifiers: Particles
of skin, make-up, and sweat can cloud spa water.
Clarifying chemicals cause
these particles to coagulate or combine into solids large enough for spa
filters and vacuums to remove. Clarifying treatments are prescribed for
spas that have not received proper care in the normal course of
operation.
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Scalers: Scaling
chemicals dissolves calcium and rust spots that may attach to the shell.
The acidic properties of these chemicals may reduce pH levels.
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Sodium carbonate:
Sodium carbonate is a pH 14
chemical designed to absorb acid in the water and return pH to the more
desirable neutral level. This helps prevent metal releases and scale
formations on the walls of the spa.
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Sodium bisulfate: High
pH levels tend to produce cloudy water and reduce the effectiveness of
sanitizers. Sodium bisulfate
lowers pH through a
chemical reaction with water, which transforms sodium bisulfate into
hypochlorous acid.
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Bubble removers: Some
spa chemicals such as bromine combine with make-up or perfume left in
the water by bathers. The combination can produce foam in the spa.
Bubble removers break down and
eliminate foam.
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Cartridge cleaners:
Spa filtration cartridges collect
dirt and debris, as well as body oils make-up and sweat. While water
will remove the dirt and debris, oil-based substances repel water.
Cartridge cleaners are
gels that break down the oil in these substances and re-open the pours
in a filtration cartridge, thus extending its life.
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