The 450 doesn't have much coral in it yet, hopefully they will get used to eating "regular" food so once it does have coral it won't be an issue.Do you plan to keep the Racoon and Pakistan in with any corals? Both are nippers, especially LPS and any clam in the tank will be a quick meal. There really are only a few "reef safe" butterfly fish - CBB and Pyramid come to mind. Everything else is going to eat something you don't want it to.