Hey all
I always run an extra filter in my 90 so I have something to use in a QT or hospital tank. My question is, what do you routinely do with a filter/media that was used in a QT for a sick fish?
Seems it would be unwise to not disinfecting it, but that means losing all the BB - which is a problem if I need that extra filter for new fish or another sick fish before the filter media gets seeded again.

So what do you all do? Assume that if the fish is healthy again, the filter is safe to put back on my main tank? Or disinfect and start over.
I know I could borrow some media from another filter if push came to shove, but my choice would be to simply put this filter back on another tank so it's ready if I need it.