hi please help i noticed that my neon was acting weird a couple of hrs ago and popped it into the breding net to get a close up, its a blue neon and normally so bright blue it is unbelieveable but its colour has completly faded and it seems to be seimming on its tail...not really swimming tho more bobbing on its tail pointing straight up, non of my other fish are like this just this 1, done tests and water stats are all normal, getting late so any advise b4 bed?