This last weekend I got a acrylic 500 gallon tank, and I have been trying to figure out what will be the best way to heat this pig. The house I live in is a rental so I can't do to much to the house itself so a household hot water heat is out. And I'm not too excited about the idea of have 4 or 5 500 watt heaters running. The only thing I have really been able to find is Jehmco has several different controllers and heaters but I'm not sure how good of quality they are. So what does eveyone that has a tank this big or bigger use to heat the sucker? Thanks for the help.