I have a pretty nasty outbreak of aptasia in my 55. I'd prefer to use the natural method of eliminating them. Besides peppermint shrimp I want to also try using berghia verruciornis nudibranch to eliminate and control these pests. Anyone know where I can get the berghia verrucornis nudibranch on line? Peppermint shrimp appear to be readily available. I have a 55 with about 50 lbs of live rock, with several softies and LPS corals. I have a Clarki clown and a blue hippo tang also. Thanks.