So I'm finally getting to the point where I think it'd be a good idea to have a sick/quarantine tank set up. I have a 37 gallon I'd like to use but my question is, how do I keep it going? Is it fine just running with no fish until it's needed? Doesn't seem practical to keep fish in there if you're going to have to move them when one of your other fish gets sick... Anyways, thanks in advance for responses!