I just picked up a fahaka puffer from the LFS on Thursday. He is about 2-3 inches. He was in a tank with about seven others like him. He was the most active and had no marks or scratches or visible diseases on him. I took him home and put it in a tank and I've feed him and he is still very active most of the time. However,I have some concernes. First I have noticed the next hay that he has very very small spots on his fins (I'm almost certain its ich). Second, yesterday I looked in the tank in the morning and there is now a small white mark on his back (looks like a scratch or ich but it grew to quick to be ich (sure it wasn't there when I bought it. Finally, today I looked in the tank in the morning and now most of his back and head seem to be covered in a greyish/transparent film. He's still moving around and eating but Im scared he's in very big trouble here. I just checked him again and now that the light has been on for a while and he ate some food he appears to be almost back to his original colour again and the spot on his back is gone (changed in the last hour or so)
for short:
-most common diseases
-colour variation in sleep
- ich remedy
- any other thoughts comments on the conditions that I have sescribed
Thanks

Some call it a product of a mis-spent youth, I call it Rock n Roll ! 
