Intex PureSpa SB-HSWF10 Owner's Manual page 24

SPA WATER CHEMISTRY AND BALANCE (continued)
Raising pH
Volume
Total Alkalinity
From→To
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
Desired level:
100 ppm
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
m (CaCl
Muriatic acid is a caustic chemical and liquid solution of sodium bisulfate (NaHSO
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.
S AVE THESE INSTRUCTIONS
Raising pH Using Sodium Bicarbonate
210 gal (795 L)
120 ppm
0.541 Lb
6.8→7.2
243 g
Calcium Hardness Adjustment
Lowering Calcium Hardness Using Soft Water
1000 ppm 500 ppm
Water Volume Ratio (Vhard water:Vsoft water)
1:9 1:4
210 gal (795 L)
) 0.197 Lb
2
WARNING
(353PO) SPA ENGLISH 7.5" X 10.3" PANTONE 295U 02/03/2023
290 gal (1098 L)
80 ppm 120 ppm
0.361 Lb 0.737 Lb
163 g 335 g
350 ppm 250 ppm
2:5
290 gal (1098 L)
89 g 0.269 Lb
) is highly acidic. Handle
4
353
English
PO
80 ppm
0.491 Lb
224 g
2:3
122 g
Page 24