I'm looking for a better way to heat a large tank. I don't like the idea of 3 or 4 submersible heaters in a large tank but b/c of past experience I don't want to use one large heater and cook everything in the tank when it goes bad. So what do you people do? Why is the glass tube the only type of heater available? I would like to have a small heat pump for my tank, it could heat or cool the tank depending on the season. Any other ideas out there?
