09-22-2008, 12:06 PM
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Agreed, anything like a rubbermaid tub will work, doesn't need to be fancy. I keep a few sponge filters running in my big tank which I can pull out to use in my QT tank when I set it up. I siphon the water from my big tank into the QT, pop in the sponge filters and VIOLA! Cycled tank!
Bigger tanks (not just a 2.5 or something) are better for medication tanks, as the medicine can kill the filtration, and you want to be able to keep water quality up. I have 3 10 gallon tanks which I generally use for breeding, hospital, QT. Any larger fish get rubbermaid tubbed.
Since I have a tendency to aquire sick, questionable or new fish a lot, and have fish that breed, I do find it very convenient to have some empty tanks at all times. However, most people probably aren't as insane as me, and would do well to just keep a tub in the attic and some sponge filters in the main tank.