Copper still there?

[justinl]

As far as I know, if your stuff has been exposed to copper, it becomes a potential hazard to any sort of inverts. It MAY be safe, but I wouldn't risk it myself.

Like Doug said though, there's no point in chucking it out. It would still work fine for a fish only QT. Plus it couldn't hurt to put it on that closed loop with those copper removal chemicals for a while like andy suggested.