Indy! said:
Unbreakable already handled that, but for future reference: go here, look up the pool in question, click "edit" on the toolbar along the top, and remove the post id of what you want to banish.
If you know the name or id of the pool you can also use it like a meta tag in the tag box, tagging -pool:16535 or -pool:Gochuumon_wa_Usagi_Desu_ka?_-_Is_the_Order_an_Adult_Cocoa?_(KS_(xephyrks)) will remove the post from the pool. The reverse is also true in that you can quick add a post to a pool by tagging it with those sans the - sign.
