QT question

[extremepcs]

I am going to setup a quarantine tank this weekend. The guy at my LFS said to not put any water in it until I need to use it, and to use my main tank water when I do. He said that just leaving it running with nothing in it would be bad.
Those of you with QT, do you leave a fish or something in it all of the time to keep the levels normal?
Thanks!

 

[92protruck]

I disagree with your LFS. When you need it it will not be cycled. You can still use it that way but you can't add any med's to an uncycled QT. Better to set it up and let it cycle. You can just feed it like it had a fish in it to keep the bio-filter active. I have a couple pepp. shrimp and a snail in mine that I feed.