since one of my black and white saddle back died my tank been turn up side down and there is some thing wrong with my tank... the pecking oder with my fish is completly off there is a war going on with the clowns that i have left and two more of my fish all they do is fight also and had bit of die off ...???? the coral that died was not that important xenia which i have alot of still but i still want to know y two large colony just melt away and they were grown like crazy i didnt do any thing diff lately nor added any thing new so i dont uderstand ?? i tested the water every thing ok cal little low but i dont have sps so that dont matter i didnt have spike temp or anything so i just dont know anyone having a bit of die of also or it just me ???