Need Help ?! Heating

I am going to be upgrading to a 46x12x21 aquarium....what would be the best way to heat an aquarium of this size? Also, what is the best substrate for humidity?

UTD or heat tape will heat up while lower the humidity the least. Bulbs and heating elements dry up the air quite a bit. Before I switch to tubs I mixed coconut fiber and cypress mulch but then put moss over the top of it, looks really good if your going for a display tank. Held humidity really well and didnt need to spray very often.

I forgot to mention UTD and light combos do work pretty well too as long as the lighting isnt too bright

BP's dont like light. UTH is the best.