For the heating pad, Do I stick on the bottom or just place it under it?? Or should I be doing the heat with the lights?? And for lights, hood or clamp lamps??? My tanks seems to stay around the 70 when the house is on its coolest... My humidity is between the 70 and 80%. I don't have any live plants at the moment so which lights should I be using??

and also, is there a way of knowing if both frogs are eating??