I have a highland terrarium, and the temps in it are ok, but it would be nice to get it cooler in there. I have seen mods for small ACs, but I don't want to use an AC. Could I use a mini fridge with two holes drilled in it, one on each side. PVC plumbing would run from each hole up to the terrarium. There would then be a small computer fan that pulls air out of the terrarium, and pushes cold air back in. Would something like this work for cooling the terrarium down about 15-20F at night?