heres the problem,tank is a reef setup for 18 months, critters include serpent stars and 3 pistol shrimp. first fish into the tank was a flame angel. since than, every fish into the tank has vanished, anthis, gobies, flame fish and now green chromis. nothing lasts more than a week or two. i have many tanks and the problem is in this tank only sometimes i see wounds along the side before they vanish. i'm sure it,s not a mantis and i've done the night watch looking for othercritters and nothing. thru it all the flame is perfect! is it possible the flame angle is killing all these other fish? i'm at my witts end!