Legacy Whirlpool LW 524 Owner's Manual page 21

WATER CHEMISTRY TERMS YOU SHOULD KNOW
8. 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 dissolv-
ing and pH neutral chlorine.
2. Chlorine is an immediate sanitizer and will be added as needed to maintain free chlo-
rine levels between 2.0 to 4.0 ppm.
B. Bromine (Note: Bromine use is not recommended with EcoPur filters.)
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. Bromine levels should be maintained between 2.0 to 4.0
ppm.
9. Total dissolved solids (TDS): Materials that have been dissolved by the water. i.e. Like what
happens when you put sugar in coffee or tea.
10. 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.
11. 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.
12. 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 ele-
ments, 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. The calcium hardness of your water should fall between 150 - 250 ppm.
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.
DO NOT DIVE. DO NOT DIVE. 101 19