Hey guys, pretty much done slamming my pool from a green algae mess. I am a new pool owner and was pool-stored for a few months. Last time I was in, they said I had copper in my pool (2.1 ppm at that time). I ignored this problem and finished the SLAM first. I have not done my own testing yet for metals but am looking into buying test strips. In the case that there IS copper in my pool water:
1. Is the pool safe to swim in without using any sequestering agent?
2. What kind of "stains" should I look out for that indicate that there is metal in my pool? Here's a picture of the shallow end that have this discoloration on the floor. Not sure if that is a factor of metal or high fc when shocking? Sorry if it's hard to see.