Dave's copper test suggestion

TFTestkits sells the same Taylor kits that Taylor sells. Same kit.

You might want to unplug that copper wire from your SWG (most of us do just this). Then you will not have any more copper in your water and no need to test or buy copper strips. It's unnecessary anyway as long as you're maintaining proper FC levels.
 
There are two black plugs on the Intex SWG, they plug onto the clear tube. One is for the chlorine, it is rectangular in shape, and the bar underneath is silver in color. The other one is round and the bar underneath is copper colored, or may even be green by now. Unplug the round one with the copper bar under it.
 
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