i went out to feed my pond and i noticed one goldfish seemed to looked to have a lighter spot on his back.. i figured it was turing into a "white and orange" goldfish, so i scooped him out just too see.. and i found THIS! *SICK* it almost looks like ICK, but i never saw it like this, so im thinking its some kind of fungus, i hope its not to late! my other goldfish seem to be okay... this fish's back is turning to a tan color, his eyes are getting a white fluffy looking stuff over them, spots on his body, his tail looks to be rotting, and his tail is also green! (i know my pond water is kinda green in color)... i have ICK and fungus killer for my fish tank... can i use this in a pond? should i just dip the sick goldfish in the solution? HELP!