We have the chemicals to eliminate copper staining in our pool. We have added a poly quant 60 algaecide to the pool. Our current pool chemistry is:
Free Chlorine: 2.0
Combined Chlorine: 0.0
Total Alkalinity: 70
Cyanuric Acid: 60
Calcium Hardness 230
Water Condition: Crystal clear
Tests Using TF100 Test Kit and Taylor copper test kit
We have both hydroxyethylidene diphosphonic acid and ascorbic acid. Which should we try first on black copper stains?
What should be the pH of the pool before starting ascorbic acid treatment? 7.2?
Does the TA need to be at a certain level for ascorbic acid treatment?
We have always used chelated copper algaecide. A sequestering agent (also called a chelating agent) sounds similar to the chelated properties of the copper algaecide. Both chelated copper and a sequestering agent are suppose to keep the copper in solution. After we add a sequestering agent are we still at risk for copper staining? It does not seem like chemically anything has changed. Do sequestering agents lose their effectiveness with time?
Are we condemned to adding a sequestering agent for the rest of our lives? (I am sure that is the advice we would get from a pool store.)
When we go on vacation or a malfunction of a SWG could lead to another mustard algae outbreak. If we have a CYA of 80 then shocking with bleach would require 34 ppm; that is difficult and impractical. How should we defeat the next mustard algae outbreak without a copper algaecide?