Dart frog care?

[John]

I keep the frog room at about 65 F (18 degrees C) at night and let the lights above the terraria warm them into the 70s (early to mid 20s) during the day - I use fluorescent lights. Actually the space heater is situated low down in the room, so the terraria, being above the heater, are more like 68 F (20 C) at night. A similar arrangement may work for you.

I've never heated darts using a heatpad so I don't know how that would work out. You certainly couldn't do it from underneath - instead you'd have to use a waterproof heat cable with a thermostat.