I hear alot of people talking about keeping CBB some with success some not. I would just like to share my experience with mine. No guarentees just my experience. I purchased my CBB over 6 years ago from Marine Solutions out of the runway. When I first got it, it ate all my little feather dusters and then all my aptasia. Then I had to find a way to feed it and I believe the solution I came up with is the reason I have been able to keep it alive so long. The answer I came up with was using a cone worm feeder slightly modified to enable it to feed at a slower pace than the more aggressive fish.
I cut four slots at the bottom of the cone, 2 a little higher than the other and then I attached the cone to my center brace, I use fishing line but thats just how I do it. I usually feed flake, pellets or nori first and allow the more aggresive fish to get a little full on that and then I use Spirulina enriched Brine and Mysis in the cone feeder. As it thaws and sinks the CBB because of it's skinny snout can stick it in the cone and gets first dibs on the food. I also use table shrimp and clams but it must be blended really small. I have also had success feeding freeze dried mysis and blood worms using a floating feeder.
Finally I have never really seen my CBB eat corals, though I have seen it pick at GSP and a couple acans, but it never has done any damage. I have posted this before but I also kept it with clams for about 2 years with no problems then out of nowhere it destroyed a super nice crocea. Since then I have tried clams 2 with no success. So for now I have 1 happy CBB, no aptasia or feather dusters and no clams. If you get a CBB that you have seen eat brine or mysis at the LFS this is a great way to keep them fat and happy. Hope this helps some one.