> I have acquired a 70 gal Tall fish tank which I would like to turn it > upside down and use it to make a "mini" green house or cold frame. Does > anyone think this is a feasible thing? If you leave it in normal orientation, you can use it as a terrarium for any potted plants which can fit inside, by simply covering it with something/anything, e.g. piece of glass, cardboard, plastic wrap, whatever (translucent lets light in, so is better of course). Leaving it this way, you can adjust the top to vent out moisture, not to mention add water if ever needed or do whatever is needed to take care of the inevitable aphids and other bugs you will get in there, all of which otherwise will be very very difficult to deal with, with a heavy fragile tank turned upside down atop all. --- Brent