Materials matter: copper resists corrosion and conducts well

https://blogfreely.net/galenacmeo/diy-electroculture-projects-antennas-ley-line-mapping-and-garden-layouts

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.