So I am 3 months into this hobby. I have a frag of Acan and Frogspawn I just purchased and caught my emerald crab tearing up and eating both of them.....is this normal? I got the crab for bubble algae, but its all gone now, should I get rid of it now? Are they not coral safe? I need to catch him tonight and put him in my qt tank until I figure out what to do.....in the mean time i moved both of those frags on the opposite side of the tank, hoping they will get a break and recover.....