yea i have them in my tank as well and have never had a problem with them....like mr cob said...u can dip ur zoos to get any hitch hikers off.....i bought some frags which i didnt acclimate or dip and ended up battling zoo eating nudibranchs.....i finally got em under control but they did do a good share of damage....thas y now i dip everything...jus in case