hello Rob, for an adult you need a 8'x 3'x 2' galvanized livestock trough. these can be bought at hardware stores for $160. you can also use plastic tubs of around the same size.although they cost a little more.do a web search for them. you can also use a filter if you don't want to do alot of water changes like i have to do. you will also need to frame out a top or lid because they can and will escape! do you have an adult or are you thinking about getting one? Steve

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