My fish are dying with no warning. I have a 55g tank, with live rock and sand, has been set up for almost a year. I battled ich even went through hurricane sandy with no losses. Yesterday for no reason my coral beauty which was my first and most resilient fish died with no warning. My new copperband just died today and my green mandarin looks like he is on his way out. All levels are ok. My coral is doing great. The only new thing i noticed is some red and maroon colored algae (almost hair-like) growing all over. Did a 20% water change on sunday and it has already come back completely all over the tank. I dont want to oose anymore fish fish PLEASE HELP!