I quarantined a couple of goldfish for about 2 weeks. Everything was fine. I added them to a 55 gallon tank with sand. They rolled around in the sand and the next day white spots were all over them. The day after? Even more. Thing is, its barely on the fins. Just on the body. And the goldfish that has been in the tank prior has none on their body. Just the two newly added goldfish. The old goldfish also doesnt rummage through the sand much. Only its bottom fins have some black and white sand on them from when it was feeding. But it doesnt roll around in the sand like the other two. I know fish get ich from being stressed. But they showed no ich for 2 weeks in the quarantine tank. IDK what would be more stressful about this one? The water quality is better in this tank.
I don't want to quarantine everyone again and treat them unless I am sure. Here are some pictures. Sorry if they are hard to see. Please help if you can. Im so stressed about this.
The fins have always been a bit red. But I think they are getting progressively worse. (Sorry for the spots on the tank). There seems to be a growth on the tail too that looks a little concerning/abnormal. Im thinking about putting them in a hospital tank. But Im concerned that bacteria may be the culprit.
I have a very large fancy goldfish that keeps eating but spitting the food back out. I know that there are issues with the fins. But I can't pinpoint what is going on. There seems to be some small gas bubbles on them? White growths and one larger one on the tails. But I'm unsure what this is or how to treat it. Below is a picture. I did a water change. But Im unsure of the problem so I dont know what medicine to use. I hope its not too late for this guy :(