Generally once the algae dies, the water will change to a cloudy blue.

About the copper--once your copper level gets high enough, then you're going to have staining of the pool with higher chlorine levels, then the care of your pool is going to take on a whole new dimension.....as well as people having green hair and nails, as Watermom noted above.
Copper does have an algaecidal effect, but so does correct levels of chlorine. I personally wouldn't add anything else to the pool that contains copper!

janet