Lovibond Copper Test Tablets - Available in No.1 & No.2
Lovibond Copper Test Tablets - Available in No.1 & No.2 - Photometer or Comparitor tablets - Tests water for Copper levels.
Copper No.1 tests for FREE COPPER in a range of 0 - 5.0ppm
Copper No.2 tests for TOTAL COPPER in a range of 0 - 5.0ppm
In unbalanced water, copper may drop out of solution and cause staining of a pools submerged fixtures and pretty much all of its non-metal surfaces (i.e. vinyl liner, fiberglass bottom, concrete/gunite bottom, etc.). Typically a severe drop in alkalinity and/or pH can result in copper staining with the right amount of free dissolved copper present.
In the case where the pool in question has a heater tests for copper in pool water yielding positive results may mean the pool water has become corrosive and has started to eat away at the copper in the heating element(s) in their heater.
A second source of copper, and also a good reason to test for copper in pool water every once in a while, has to do with the pool owners choice of algaecides. Some of the algaecides on the market contain trace amounts of copper due to coppers ability to effectively fend off an outbreak of algae in water whose chlorine or other oxidizer level has dropped. Long-term use, or most often improper overuse, of copper-based algaecides can lead to an excessive buildup of copper in the water. A severe change in alkalinity and pH, possibly as a result of a rainstorm or the addition of new water to the pool, may cause that copper to come out of solution and cause staining on the surfaces mentioned earlier.
Does Copper in Pool Water Always Mean Trouble?
Absolutely not! In fact, some pools rely on copper as their primary algistat and use very low levels of oxidizers such as chlorine to destroy any organics that do attempt to make the water their new home.