Recently I have been tasked with looking after 5 fish that live in a small garden pond after the owner passed away. Today I emptied out the pond to clean it so I put the fish in a tank, but then I noticed that most of the fish had small white lumps on their bodies and two of them had large lumps on their fins. I do not know the specific type of the fish (I think they are goldfish) and I don't know about the condition of the pond, other than the water was very murky and there was a black frog living in it too, plus green algae around the sides of the pond. I would greatly appreciate it if someone could tell me what's wrong with the fish and (if there is a problem) how to cure them