He cast his own zinc anodes out of aluminum?
Does he make his own toilet paper too?
Zinc anodes are literal throw away items.
A full set for that floating turd might have cost $100.
Of all the things to gamble on backyard chemistry with.
"If I get it right I "save" a 100 bucks and kill a day and a cylinder of propane, if I get it wrong my boat falls apart. Sounds like a fair trade to me! I will get started after I take all the guards off all my power tools, pull the batteries from my smoke detectors and cut the emergency brake cables on all my vehicles. Feel the fear and do it anyway!"
This is the most Doug brained think ever.
He probably "saves" money by using Saran wrap instead of condoms.