anybody had success with Berghia nudibranchs?

[Red Coral Aquariums]

I am now working on a Customers tank that 4 or 500 very large aptasia in it. With Underwaters help and a group order I placed 10 in the tank. On thursday it will be 2 weeks and I am interested in seeing any results. One thing I was worried about a large grouper in the tank and sure enough he swallowed one but immediately spit it out and never came near another.
I am interested in a group order if need be I will co-ordinate it.
Kevin