Thanks for the reply. I definitely don't want anyone's hair to turn green, but I'm not concerned about the staining the vinyl liner as this liner is in desperate need of replacement. I've probably put over 30 patches on it so far. My concern is that on other threads people said that copper could damage some of the pipe unions, light, and filter equipment, which I don't want.

Everything else I've done has been ineffective and I wouldn't be surprised if the algae has been surviving the shock treatments behind the light.