Ok, so recently my uncle gave me his plastic pond around 30-40 gallons(really small i know) and its odd-shaped. My plan is to fill it, and stock it with a few goldfish. The pond is a few years old and although i water tested and it doesn't leak i still plan to put an additional pond liner inside it. So basically ill have a pond liner within the plastic pond just to be safe. Since the pond is so small, I plan to put it upstairs in my bedroom corner. Good or bad idea? I've been reading that most ponds need some type of support structure or encasing to keep it from bulging or cracking. I don't really have the room to build a support structure for it and nor do i know how. Would it be ok to just use the plastic pond with the additional pond liner? What are the chances of it splitting or cracking in a small pond like this? Also, how would i install the pond liner in the pond? would i just use some type of super strong adhesive? I don't really care if it looks bad, as i'm basically using it as a fish tank except that i can look down on the fish. Any advice or suggestions about this idea would be so gladly appreciated. Sorry if this sounds like a stupid idea, but thats what i want to do with it. My biggest concern is it leaking. Please comment on this matter I have no idea what im doing hehe, thanks!