Master Spas SEATTLE Owner's Manual & Limited Warranty page 25

WATER CHEMISTRY TERMS YOU SHOULD KNOW
7. SANITIZERS: Germs and bacteria enter the water from the environment and the human body;
a sanitizer keeps the water balanced and safe to use. Either chlorine or bromine can be used
as a sanitizer to create a healthy water environment.
A. Chlorine:
1. Only one type is approved for spa use. Sodium dichlor which is granular, fast
dissolving and pH neutral chlorine.
2. Chlorine is an immediate sanitizer and will be added as needed to maintain free
chlorine levels.
B. Bromine (Note: Bromine use is not recommended with EcoPur
1. Two types of tablets:
a. Hydrotech
b. Lonza
2. Bromine is a slow dissolve chemical and may take a few days to develop a reserve
or reading in the water.
TOTAL DISSOLVED SOLIDS (TDS): Materials that have been dissolved by the water, i.e. like
8.
what happens when you put sugar in coffee or tea.
9. USEFUL LIFE OF WATER (IN DAYS): Water should be drained at least once every 180 days.
Useful life may vary by usage and bather load.
10. DEFOAMER: A chemical used to temporarily reduce foaming. Causes of foaming include body
oils, cosmetics, lotions, surface cleaners, high pH or algae, as well as other organic materials.
Low levels of calcium or sanitizer can also cause increased foaming. Note that you may need
to physically remove the foam and/or drain all or part your water to remove or dilute the
causes of the foam.
11. CALCIUM HARDNESS: This measurement tells you how much magnesium and calcium are in
your water. However, calcium hardness can react with all of the chemicals, bacteria, dirt and
other substances that your water dissolves and get thrown out of balance. Just like the other
elements, calcium levels must remain balanced and need to be monitored or you run the risk
of metal deterioration, water foaming or clouding and scale formation at the surface of your
water.
NOTE: Always leave spa cover open for 15 minutes after adding chemicals to prevent the off
gas from damaging your spa cover, spa pillows, stainless steel hardware and other
critical parts.
12. BIOFILM: This is any group of microorganisms in which cells stick to each other and often
these cells adhere to a surface (ie. spa plumbing and shell). Biofilm can occur over time during
the use of your spa.
DO NOT DIVE. DO NOT DIVE. 101 23
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filters.)