Hi guys,
I’m setting up a new tank to move my now almost adult Amazon Milk Frogs into.
They are currently in a 12x12x18 (30x30x45cm) exoterra with a heatmat underneath the base heating the substrate, this works fine and keeps the tank at the correct temperature.

My question is where do most people mount their heatmats in order to yield the best heat from them? I’ve heard that people put the mats behind the exoterra background but surely that would lose more heat than gain it?
The new tank is 60 x 45 x 60 cm / 24” x 18” x 24” exoterra so much bigger and I want to be able to heat it as effectively as possible. Its needs to be around 70-85f/22-30c to give to an idea of the temperature I’m trying to achieve!
Thanks