Aluminum is the worst material for a water heater tank - or any water tank for that matter. Many use glass lined steel. The better ones are stainless.
Brands? Stay away from Kuuma,a cheaply built Seaward copy - aluminum tank. Seaward has aluminum tank as well but unlike Kuuma does accept an anode (magnesium) to ward off corrosion.
Raritan and Torrid are good tanks. Glass lined.
IsoTherm is probably the best commonly available water heater. Stainless tank.
You do really get what you pay for.
Brands? Stay away from Kuuma,a cheaply built Seaward copy - aluminum tank. Seaward has aluminum tank as well but unlike Kuuma does accept an anode (magnesium) to ward off corrosion.
Raritan and Torrid are good tanks. Glass lined.
IsoTherm is probably the best commonly available water heater. Stainless tank.
You do really get what you pay for.