LaMotte Pool Manager Water Quality Handbook - Manual (Page 45)

Scale
Confirmation
Crusty deposits on pool surfaces
Cause
• High calcium hardness
• High pH and alkalinity
• High TDS
Treatment
• Adjust pH and alkalinity to ideal ranges (7.2-7.6 and 80-120
respectively)
• Replace a volume of pool water with water low in hardness
and dissolved solids. Consult a pool professional to determine
the replacement amount
• Use a sequestering agent to prevent scale build-up if high
hardness levels are a continuing problem
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