In about a week or so I am going to start remodeling an extra room in my garage. I want to re insulate and put up new dry wall and I plan on this being my reptile room. I am going to build permanent racks along one wall as to size I don;t know yet most likely cb70's. But wanted to know the most efficient way to heat possibly 40 tubs and the rest larger tanks for my larger snakes. I was brainstorming with my brother and thought "what about water?". I figure I could have a reservoir (30 gallons) put some sort of heating element in it connected to a t stat. then I could run either copper tubing or clear vinyl tubing under the tubs and just pump the water through that. Any one ever try this or seen it done. I am curious as to how it will work. THanks. Figure I might try this on a smaller scale first.