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264
A
S AVE THESE INSTRUCTIONS
(264IO) SPA (JET + BUBBLE) ENGLISH 7.5” X 10.3” PANTONE 295U 11/21/2014
English
Page 19
Calcium Hardness Adjustment
Use the included test strips to check the water hardness level and adjust it following below chart.
Lowering Calcium Hardness
If your household water supply is treated with a softener, mix the spa hard water with the soft water
according to the water volume ratio chart to lower the calcium hardness:
Initial level
1000 ppm
500 ppm
350 ppm
250 ppm
Desired level:
100 ppm
Water Volume Ratio
(Vhard water:Vsoft water)
1:9
1:4
2:5
2:3
Lowering Calcium Hardness Using Soft Water
SPA WATER CHEMISTRY AND BALANCE (continued)
Raising Calcium Hardness
If the calcium hardness level in the spa water is lower than 100 ppm, add 89 g or 0.197 Lb of calcium
chloride into the spa water.
WARNING
Muriatic acid is a caustic chemical and liquid solution of sodium bisulfate (NaHSO
4
)
is highly acidic. Handle all chemicals with care and wear extra personnel protective
equipment including goggle and gloves. It is very important not to splash acid onto
your skin or clothing, or into your eyes.
Volume
Total Alkalinity
From
→
To
6.8
→
7.2
210 gal
(800 L)
120 ppm
0.541 Lb
243 g
80 ppm
0.361 Lb
163 g
Raising pH
Raising pH Using Sodium Bicarbonate