SWIMMING POOL APPLICATIONS
pH OF COMMON POOL CHEMICALS
HTH (Calcium
Hypochlorite)
X100
Sodium
Hypochlorite
Caustic
Soda
X10,000,000
Soda
Ash
On Site
Generation
X1,000
X100,000
Tri-tabs
X10,000
0
X10,000
Chlorine Gas
Dry Acid
X100,000
X1,000
X10
X10
Hydrochloric
Acid
X10,000,000
X1,000,000
Ideal Range
X1,000,000
Fi-CLOR Granules
BCDMH
(Aquabrome etc.)
Carbon
Dioxide
X100
pH 14
pH 13
pH 12
pH 11
pH 10
More Alkaline
pH 9
pH 8
pH 7
pH 6
pH 5
pH 4
pH 3
pH 2
pH 1
pH 0
More Acidic
• Ideally swimming pools should have a pH level of between 7.2 and 7.6.
• Low pH causes:
- Corrosion of equipment
- Smarting eyes
- Chlorinous smells
- Skin irritation
CO2 from CryoService combined with HTH provides the most accurate control of pH as they are closest to the pH balance and are therefore effected less by minor imbalances.
Sodium Hypochrorite and Hydrochloric Acid have a much greater range from the pH balance and the smallest error in dosing could cause a significant impact on the pH control.
0797/02