299
A
S AVE THESE INSTRUCTIONS
(299IO) SPA (JET + BUBBLE) ENGLISH 7.5” X 10.3” PANTONE 295U 06/30/2016
English
Page 19
SPA WATER CHEMISTRY AND BALANCE (continued)
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.
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
Raising pH
Raising pH Using Sodium Bicarbonate
Volume 210 gal (795 L) 290 gal (1098 L)
Total Alkalinity 120 ppm 80 ppm 120 ppm 80 ppm
From→To 6.8→7.2
0.541 Lb 0.361 Lb 0.737 Lb 0.491 Lb
243 g 163 g 335 g 224 g
Raising Calcium Hardness
If the calcium hardness level in the spa water is lower than 100 ppm, add calcium chloride into the spa
water.
Volume 210 gal (795 L) 290 gal (1098 L)
m (CaCl
2
) 0.197 Lb 89 g 0.269 Lb 122 g
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