pH control is important to ensure long life of copper components. However, when copper pipes are present, you must consider galvanic corrosion issues as well. In this situation, proper bonding of ALL metallic components in the pool and around it is critical not only for personal safety (electrocution hazards) but also galvanic corrosion.
Can you please post more information about the pool? Size & construction/surface type, other equipment at the pad (heaters, lights, etc) and in the pool (ladders, diving boards). Also, have you had this pool inspected and so you know of it is properly bonded? Is there a concrete deck around the pool? Is there rebar in that deck and is it bonded to the pool?