You can also use dog/cat dewormer to take care of them. From what I've read this won't hurt your shrimp in reasonable doses. And yes they are potentially harmful to shrimp as they are carnivorous and have been seen attacking shrimplets and even adult shrimp.
10G - Low Tech Planted [ Chocolate Neos, MTS, Tracked Nerite / Anubias Nana, Windelov Java Fern, Water Wisteria, Dwarf Sag ]29G
- Non Planted Native Tank [ Creek Chub, Yellowfin Shiners, MTS / Water Wisteria ]