i moved my tank on sunday from a 55 to a 90 i used all the same water from the 55 same sand and same liverock. since then my tang has nit eaten and today when i came home he is all stiff like he cant move his back fin. I need your help i have had he for about 2 years and would hate to loose him. I have checked all my levels since i changed tanks and everything is fine. thanks for the help