I side with Jacob on this one, but if you want to remove them... Get a piece of 1 inch pvc 5 inches long, and 2 caps. Drill 10-15 1/4 inch holes in the pvc in a random pattern. Then put a small piece (1/2 inch will do)of shrimp in the tube, place on the two caps. Put it in your tank (on the bottom)when the lights are out and remove it in the morning (make sure you remove and clean it out daily or it will produce large quantities of ammonia), dump out all the worms and repeat till your happy. Good luck.
Eric