Hi now my pond water is nice and clean and plants cut back i can see the fish more but i have noticed that one of my very large goldfish has 2 lumps one is on his head just above his eyes and the other just a little bit above that one he seems happy coming up to the top to feed and his not going off on his own ( like some of my fish have done when not well in the past ) but not sure what to do no new fish have been added to the water and no fish have died i do have a few baby fish that have been bred in the pond but other then that no new fish have been put in the pond ,any ideas ? All other fish are fine