Another post just made me think of something else. I remembered a few times needing a quarantine tank and didn't have enough set up so I would just throw one up where ever I could. Then I got smart and
Empty Rubbermaid Bin- Quick and easy way with a simple sponge filter and pump to set up a quarantine tank. It also works great if you have to break down and move large aquariums with lots of fish or larger fish. Have to break down a rock wall of 300lbs of rock for that prized African show tank, keep it all wet so you don't kill off bacteria and have a mini cycle. They will bow like crazy if over loaded, but work well in a pinch.