West wind, like mie said they are good scavengers. If you decide you don't want them there is a small tube type trap that you can get at the LFS. I had a lot of them and decided to thin them out so I purchased one, "Trap- Em" is the name on the package. It's a tube that has an opening on each end. You place some bait, which comes with the trap, in a compartment in the middle of the tube. The worms crawl in and can't get out. When I put it in my tank and turned off the lights it wasn't 5 minutes and they were all over it. I wasn't going to take any of them out but my wife insisted on at least thinning them out. Hope this helps. Happy Thanksgiving !!!