Why is PH important?

What is pH
  • potential Hydrogen
  • The measure of the acidity or basicity of a solution
  • The relationship between Hydrogen (H+) and Hydroxyl (OH-) Ions
  • A scale between 0 and 14
  • Logarithmic
  • pH 7 is considered neutral
  • pH less than 7 – acidic
  • pH greater than 7 – basic or alkalinity
Why Is It Important

• In hot tub water, it is important to maintain pH in the range of 7.4 – 7.6

o Bather comfort
o Sanitizer efficiency
o Protection of surfaces from scale, stains, corrosion
o Clear water
o Fewer problems / easier maintenance
Why Does it Change
• Frequent product additions
  • Every product has a pH
                 Salt systems – high
                  Ozone - high
• Bather load / bather wastes
• Aeration
• Fill water
Problems Associated with pH:
When low:

• Uncomfortable, irritating
• Corrodes surfaces
• Sanitizer dissipates quickly
When high
  • Uncomfortable
  • Scale forms more readily
  • Sanitizers weaker
o Cloudy water (calcium)
kath creery

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