Hi everyone this is my first post, i have had 2 barramundi in a 2 foot tank for a few months now and yesterday all of a sudden they started fliccking and darting round the tank, within minutes the smaller barra and 4 rossy barbs for feeding were dead. i started racing to do water changes not really knowing what was happening. The larger barra seemed to relax and start to recover but this moring he was dead. Can anyone tell me why my fish would die so suddenly? Thanks Ruxton1