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bromine, which rapidly forms the active sanitizer - hypobromous acid - in
spa water. Upon reaction with bacteria and other spa contaminants, hy-
pobromous acid is reduced back to bromide ion, ready to be activated
again by the next dose of potassium monopersulfate. Potassium monop-
ersulfate begins to produce bromine immediately and continues to do so
for several hours, providing sufficient time for oxidation of bather waste
and other organic contamination such as ammonia and nitrogen.
NON-CHLORINE SHOCK (Potassium Monopersulfate)
– Also known
as “Oxy-Shock”, is an important chemical used in the process of disinfect-
ing and sanitizing the spa water. Non-chlorine shock is used as an oxi-
dation agent to oxidize and eliminate organic contaminants, dead algae
and debris, and will also convert the chlorine by-products (chlorides and
chloramines) back into free available chlorine.
When used with bromine products, non-chlorine shock is used with so-
dium bromide in a two-part disinfection system. Potassium monoper-
sulfate (non- chlorine shock) is added to oxidize, or activate, bromide ion
to bromine which rapidly forms the active sanitizer - hypobromous acid
- in spa water. Upon reaction with bacteria and other spa contaminants,
hypobromous acid is reduced back to bromide ion, ready to be activated
again by the next dose of potassium monopersulfate.
Most non-chlorine shock products have buffers that reduce pH instabil-
ity, and corrosion inhibitors that help protect the heater and other metal
surfaces.
OZONE
– Ozone is a powerful gas that is used as a sanitizer and an
oxidant to keep the spa water clean and disinfected. Although ozone
is about 3000 times more powerful than chlorine, it has a tendency to
dissipate quickly and does not create any sanitizer residual. By using an
ozonator for your spa, you can cut maintenance time and chemical costs
by as much as 60%. Ozone is manufactured by an ozonator (ozone gen-
erator) and is dispensed during the filtration mode.
pH Controllers
SODIUM BICARBONATE
- Commonly used to increase pH and total alka-
linity of spa water. Sodium bicarbonate is also known as natural baking
soda.
SODIUM CARBONATE
– Also known as soda ash, is a substance used to
raise pH and total alkalinity.
SODIUM BISULFATE
– Also known as dry acid, the chemical used to low-
er pH and total alkalinity of spa water.
MURIATIC ACID
– A liquid acid that is most commonly used to reduce
pH and total alkalinity levels. It tends to be very strong and is not recom-
mended for use in spas.
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