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Cloudy Water
Possible Cause
High pH, alkalinity, calcium or TDS can
contribute to cloudy water
Reduced filtration
Heavy bather load
Unable to Maintain Free Chlorine
(or other primary sanitizer)
Possible Cause
High TDS or pH
High combined chlorine level
Sunlight dissipating chlorine
Heavy bather loads
High nitrate level increases chlorine demand
Colored Water
Possible Cause
Green: algae growth, low free chlorine, or high
nitrate level
Reddish-brown: high iron or manganese
Blue-green: high copper
AquaChek TruTest Gives No Free Chlorine Reading, but
DPD Kit Gives a High Free Chlorine Reading
Possible Cause
Very high chloramine level (High combined chlorine
can cause DPD #1 kits to give false readings for free
chlorine.)
Solution
Reduce levels or add fresh water to dilute.
Check for blockage and clean traps.
You may need to superchlorinate.
Solution
Reduce levels or add fresh water to dilute.
Superchlorinate. May require double dose or more.
Add cyanuric acid (stabilizer).
Increase sanitizer distribution.
Add fresh water to dilute.
Solution
Treat with algaecide and/or superchlorinate.
Add sequestering (or chelating) agent.
Add sequestering agent.
Solution
The free chlorine reading on your AquaChek meter is
correct! This is a common problem at the beginning
of the season. Test for total chlorine using AquaChek
Select
or AquaChek
7. You may need to shock
®
®
the water.
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