Materials matter: copper resists corrosion and conducts well

https://canvas.instructure.com/eportfolios/4300704/home/electroculture-and-soil-health-what-gardeners-should-know

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.