I think Pippin has come down with a mild case of ich, if I'm not mistaken.
He has a fuzzy looking white spot on his dorsal fin, although it has not spread to anywhere else that I can see. However, he has been flashing/scratching one side of his face on rocks and such. I don't see any spots there, though.
I'm not really sure what to do about this...any suggestions?
Owner of one happy little Green Spotted Puffer. :)