LaMotte Pool Manager Water Quality Handbook - Manual (Page 21)

Temperature
Water temperature is an important
comfort factor for swimmers, and for the
health of the pool as well. Pool water
should be maintained between
75°-85°F. Every pool should have an
accurate thermometer for measuring
water temperature.
As water warms, the substances within
the water become more reactive and
aggressive. Higher water temperatures
provide an environment where scale
and cloudy water are more likely to
occur, and evaporation increases.
At cooler temperatures, a pool is prone to corrosion if
the water is not properly saturated with minerals.
Water temperature is actually another key element in
calculating the pool’s saturation index, but plays a
smaller role than pH, total alkalinity and calcium
hardness. In spas, where water temperatures reach 104°F,
it is very important to maintain proper saturation index
levels since heaters and other fixtures can be quickly
damaged.
Ideal Range for Temperature
Pools: 75 - 85°F
19
0
10
20
30
40
50
60
70
80
90
100
OK
ºF