Owner`s manual

6
CALCIUM HARDNESS: Calcium hardness is a measure of dissolved calcium in the spa’s water.
While calcium hardness is important to water balance, it is not as frequently tested as pH and total
alkalinity. In fact, most consumer test kits do not test calcium hardness. As such, periodically have your
water tested by Eastgate Pools so that we can advise you as to what treatment, if any, is needed.
The calcium hardness should be kept in the following range:
Calcium Hardness - 120 to 250 PPM
If the calcium hardness is out of range, the spa owner may see the following problems:
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Since calcium hardness will be tested at our store, any recommended action , if needed, will be
prescribed when we test the water. In general, spa water with low calcium hardness will need a calcium
increaser, and spa water with a high calcium hardness level will need to have the water either changed
or diluted with fresh water. It is also possible to control the calcium by using White River Stain & Scale
remover.
While White River Stain & Scale remover will not remove the calcium from the water, it will help to
keep the calcium from coming out of solution and depositing on the spa and its equipment. Regular
use of this product is essential no matter what the calcium level is for your spa
water due to how calcium reacts in hot water.
Unlike most items that dissolve in water, calcium is less soluble as the water temperature
increases. What happens on spas is that the heating element will be the first place for the calcium to
deposit due to its high temperature. If you see calcium deposits on the spa surface, you can almost be
guaranteed that the heater will also be covered with deposits. The use of White River Stain & Scale
remover will help prevent this problem.
Hardness Level
Problem
Calcium Hardness
Too L o w
•Corrodes Spa Equipment
Calcium Hardness
Too H i g h
•Makes Water Cloudy
•Scale may form on equipment and surfaces