I'm on board with peppermints from the fl keys. KP Aquatics is my go to source for them. They have worked quite well in my experience but stop short on the larger aiptasia. BTW, as you have already considered, peppermints do NOT go with berghia's, definately would have to choose one or the other. I have been considering the berghia's but I have 7 wrasses so that is a deal breaker for me.