copperband

I bought this copperband butterfly from Liveaquaria. It came with a white big spot in its back fin and one side fin. After one day he is showing more but they look a bit different that ich. They are bigger. Do you have any idea what can it be and what should I use? I have to say he is eating...

Acrylic display dimensions: 98'' x 48'' x 12'' 240 gallons center overflow 4 sided island Stand: simple 2x4 stand painted white 43'' tall Sump/non reef safe fish: dimensions 96'' x 48'' x 12'' no baffles around 150lbs of live rock Skimmer: royal exclusiv bubble king super marin 300 + rd3...