Essikr,

Hope you had a great Father's day. I would suggest you consider Waterbear's post and confirm/deny the copper level in your water before you take any additional actions including more swimming.

re: the staining. Given your CYA level you may have a very hard time controlling your Metals even with the Sequestering Agent.

I would reccomend that you post another complete set of numbers including your current CYA level.