Summary
The results of this study clearly demonstrated that:
• Free chlorine has by far the greatest influence on the disinfection conditions and the incidence of algae in pools than any other variable.
• Other variables can affect the disinfection conditions but their effects can be easily controlled by maintaining free chlorine at the appropriate concentration continuously.
• Swimming pool operations that use a 1.0 - 5.0 ppm free chlorine range have a greater probability of being bacteriologically satisfactory for swimming than those that use a 1.0 - 3.0 ppm range.
• Higher (3.0 ppm or more) free chlorine concentrations are required to reduce the incidence of algae than are required to maintain adequate disinfection conditions.
• High cyanuric acid did not negatively impact the disinfection conditions or the incidence of algae.
In the last statement of the summary they go on to say that the high cyanuric acid levels did not negatively impact the disinfection conditions or incidence of algae. Yet...they found it necessary to raise the disinfectant levels from 1-5ppm to 3ppm-or more when there was a presence of algae.

I would rate the study inconclusive at best.

dan