Diagnosing Water Discolouration

The pool water is supposed to be blue, but unfortunately, there may be times when this is not the case. And sometimes the colours it can turn will really confuse the owner and store personnel. Use the chart below to help determine what might be causing the discolouration.

Colour of Water Clarity of Water Possible Problem
Green, Turquoise or Grey Clear Copper or Small-Celled Green Algae
Reddish-brown or Rust Clear or cloudy Iron
Dark Coffee Brown or Purple Clear or cloudy Manganese
Dark Green Cloudy Green Algae
Yellowish-Green Cloudy Mustard Algae
Yellowish-Green Clear High Total Bromine/Low pH