We recently bought a new 2021 Crossroads Zinger Camper. It came with a Dometic Water Heater. I reached out to the manufacturer, about anode rods. Finding one that fits is difficult. The manufacturer explains they don't suggest using one, and that using it could cause issues. They claim the tank is made of aluminum and therefore an anode rod isn't necessary. But I thought the whole point of an anode rod is to be a sacrificial rod so the tank doesn't deteriorate? So by not having one would be a bad thing right?