Materials matter: copper resists corrosion and conducts well

https://www.scribd.com/document/1026436291/Electro-culture-in-Ornamental-Gardening-More-Blooms-Brighter-Colors-203053

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.