...I read the care sheet and was wondering what is better a heat mat or an over head heat lamp.
Heat mats are very inneficient; can get a red lamp and run it 24H on or a ceramic heat emitter.
Also beside coco fiber (Eco-earth stuff), a water dish, and plants would I really need anything else?
Temp & humidity gauges, background or similar paper to cover back and sides, lot's of food

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Also where is the best place to purchase one?...
Mike sells them on forum.
One last question, it really has nothing to do with the post but I was on YouTube and saw someone feeding their pacman a live mouse, is that safe? I mean even at the zoo everything was frozen and tong fed. I'm just curious.
No, mice can bite frog when attacked, then wound can get infected.