If you add the Berghia, please make sure to do one/both of the following:
1) turn some of your bigger powerheads off
2) dial large powerheads down
I've had far too many friends and customers purchase & acclimate them, only to have them get vaporized by a Tunze/VorTech/MaxiJet/Korallia That being said, if you purchase the Berghia, do be sure to get an adequate number of them for your size aquarium. It should be pretty easy to resell them to somebody else after you're done, to ensure they keep doing their job & do not starve to death. There is always somebody in town with Aiptasia who could benefit from helping the little guys food supply, and help you recoup some of your cost
Good point Randy @ 12,000 GPH of flow these guys wouldn't be my best bet.
I'm going to try the aiptasia X and get a few peppermints. Thanks for all the great ideas guys.