coral beauty and flame angel died today. now my kole tang is breathing heavy. anthias is acting weird not breathing heavy yet. clowns seem ok all parameters are ok, had them double checked by LFS. What could this be?! some said stray voltage, but voltage meter is pos! heater was causing like 2.5v then tank read 0 when i took it out. then checked again few hours later and its back up! wth! think the meter is junk. what could be causing my fish to die? please help!