I'm new to the forum, but not new to owning a pool.
The algae in my pool got way out of control early this season. It is a typical kidney-shaped in ground pool. Bromine is the sanitizer.
Before shocking it, I decided to satisfy my curiosity and test the sample using the ion chromatograph at school. I also tested for free and total Chlorine. Here are the results:
Free Cl: 1.85 mg/L
Total Cl: 2.05 mg/L
Chloride: 158 mg/L
Sulfate: 248 mg/L
Phosphate: 3.9 mg/L
Nitrate: 0.16 mg/L
Bromide was also detected by the IC- but the machine was not calibrated with a bromide standard, so it did not calculate the concentration. I've attached the PDF with the graph and outputs.
For the pool chemistry experts out there, what do you think?
My thoughts are that phosphates are quite high, providing ample nutrients for algae to grow. The high concentration of sulfates is evidence of using lots of algaecide in the past.