Hey Darren, ok I did some more checking into it and to make it work thee would have to be two peltier one in the water sending another medium to the other (which is outside the tank) althought this would be fairly simple to do in a sump or something.
The idea I had was using only one plate though.. if you use a baffle in the sump and place it befor a spill over so the water is always in contact with one side of the peltier it would work good. but I have found out that almost all peltier's use copper on one of there sides.. so guess any contact is out unless you can seal it with a conductive material.. if you are having a hard time seeing what I am talking about maby this pic I drew up will help.. no flames on the art work please [img]images/smiles/icon_smile.gif[/img]
http://members.home.net/s.l.s/peltier.jpg
the Peltier is red and the water level is blue..
but if you want to see more ideas and stuff for them you can check out
www.overclockers.com and other sites like that..
Steve
[ 09 November 2001: Message edited by: StirCrazy ]