Terrarium set-up questions

[Disco]

Alright next question... Heaters! Looking more towards golden bell frogs now as they would appreciate more water (really liking the paludarium idea), so they need to be kept a little warm and have not thought too much about fish yet but i do like tetras, which will need heaters also as my house is cold... In this situation can you get one heater to heat both the water and terrestrial environment? An undergravel heater maybe? Would keeping the water warm and having a light emitting a little bit of heat be enough?

[deranged chipmunk]

I can't really comment on undergravel heaters. They aren't very popular in the U.S. i saw one at a local fish store but i keep debating trying it. Warm water will heat the air above it, but the air will be cooler than the water. You may have to do some testing. If your water temp is spot on for the fish (i keep all my tanks at 78° F) and your air temp is still low, you can try supplementing with an under tank heater affixed to the side of the enclosure. Just remember, set your water temp first, then go from there.