There is no way that your temps are right with house temps that cold with only a uth. My house stays at 68 and in these cooler months will be around 66. At that temp I have to use a uth and a 100 watt CHE for the warm side and a 60 watt bulb to keep the temps up on the cool side. This is in a 40 gallon tank with the screen mostly covered.
It sounds like you need some ceramic heaters or some heat lamps. Also covering three sides with thick paper or something to insulate it will help up raise a few degrees.
Reply With Quote