I am thinking ahead to my next project. I have the bug and it is driving me to fufill my dream Aquariums since I found MFK. My next Project I hope will be a 500G wood tank. my plan is to use the Glass from my 150G tank to build it. in it there are 4 usable Glass Pains 2 @ 40"X36" and 2 @ 20"X36" I thought it would look cool kinda like looking out a living room window just bigger. I had a brainwave on heating it though. right now I swear I heat my house with my Aquariums. I have a poiler in my house and hot water in floor heat. since I started adding Aquariums it never kicks on. my hot water is heated off a heat exchanger off the boiler so I got to thinking why not heat the aquariums with the same system. then I can drop using the electric heaters and go to much more economical heating and use Nat. Gas. I was wondering though before I go and spend a ton of time researching if anyone has any experience with this that they could pass on? thanks in advance