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If you have answers, please help by responding to the unanswered posts.
As a note, please make sure that you have thoroughly checked your local ordinances to know that collection of live fish (and that species in particular) for the purpose of keeping them as pets is indeed legal.
I definitely agree with that. Damsels are kinda nasty once they get large and even though this guy's a predator he's really awesome. You may want to swap him out later so you can have shrimp and other fish but it isn't worth changing him for damsels.