Well Im finally going to get around to it. Ive been designing this beauty in my head for a while now. Its not technically a pond but its a see into above ground pond like they have at aquariums. Since I am in North Florida we actually have winter here. Therefore the tank will be build out of 2 by 4 and plywood and insulated just like a house. Then the space will be lined with a pond liner and one side will have half inch 4'2' tempered glass with the liner cemented to it. The lid will be 6' by 3' doors on top with plexiglass tops to allow sunlight in but to limit heat loss in the winer and to limit evaporation of water. I will begin building soon (need paycheck). As far as external aesthetics everything on the outside, except for the glass, will be sprayed with Rustoleums sweet stone surface spray. Finally found a use for that stuff.