I can't imagine that their lineup of nutes is missing one micronutrient. Also, there is probably some copper in your tap water.
And, if indeed the high phosphorus is blocking the uptake of copper, adding more copper won't compensate for it. Lowering the P is the way to tackle that.
And, if indeed the high phosphorus is blocking the uptake of copper, adding more copper won't compensate for it. Lowering the P is the way to tackle that.