if i was to get hold of a bath tub, and silicone the plug hole so it cant leak, and make some sort of framework to hold it, would it be possible to use it as an outdoor goldfish pond? i know its a very odd thing to ask, but i was thinking about it last night, and between the sides of the bath tub and the exterior of the frame work, i could have polystyrene tiles or something to help keep temps more stable,then clad the framework with wood. i was just wondering peoples thoughts on it. i would build the framework and use pond liner but i hate the way it creases at the corners. its just an idea, no doubt it wont come to fruition but i thought id ask anyway. also, if i was to do this, how many goldfish do you think it could hold? thanks for reading.