Originally Posted by ian14
I dont believe that Ceratophrys need uv. More importantly is a heat source.
Mats do not warm the air, so unless in a warm room., it won't help much. They should also never be used with a deep substrate as this leads to thermal blocking which can in turn cause the mat to overheat.
I suspect that the overall ambient temperature is just too low. Why not replace that uv bulb with a spot lamp, low wattage, to actually warm the air.
My pacman is on a mat under a quarter of his tank. The mat is under 1" of substrate, the rest of the floor is under 2" of substrate. He goes on the mat when he wants to. & he feeds all the time.