I'm definitely going to check out the other options, i.e. heating tape and heat blower, but would my little electric radiant heaters work? They stand about 28 inches high and they have two vertical heating elements that seem to heat primarily objects they are pointed at. I wonder what kind of electricity costs we're talking here for the winter. If I could make this work then the perch would grow faster as well. The entire building is 42 X 68, but the room that the fish are in is 42 X 15 with an 8.5 foot ceiling.
