Materials matter: copper resists corrosion and conducts well

https://www.scribd.com/document/1032203624/Electro-culture-Gardening-for-Succulents-and-Cacti-Special-Considerations-232725

Materials matter: copper resists corrosion and conducts well, while galvanized steel is cheaper but heavier; choose durable wood or bamboo for masts, and avoid treated lumber that may leach chemicals.