The easiest way would be to keep the chlorine & pH low for a month; run the filter 24/7 and use the CuLator package. Some of the copper should come out on the filter, and the CuLator will bind some. If you also use polyquat 2x per week during this period you will (a) reduce the risk of algae from low chlorine, and (b) improve filtration.

Links:
Kem-Tek 311-6 Pool and Spa 60-Percent Concentrated Algaecide, 1 Quart
The CuLator product is a special patented plastic material, contained in a bag that goes into the skimmer, that can slowly take metals OUT of your pool water. We think it works, and have some evidence that it does, but not proof yet. (Not likely to be available locally.)
1 ppm Culator @ Amazon
1.5 ppm Culator
4 ppm Culator
Poolmaster 16242 Poolmaster Skimmer Basket Liner @ Amazon (to protect CuLator from being damaged by scum)