We've had a fancy goldfish and a small catfish in a 10 gallon tank for a few years now and recently (April 4) added 4 ghost shrimp, 2 mollys, and 1 platy to the same tank. We noticed the platy was nipping at the goldfish, so we removed it and gave it away to a friend. All seemed to be going well after that, but last week we noticed the goldfish exhibiting what we thought were swim bladder issues. We tried to address that with fasting, but over the few days, we noticed a lot of white dots on the fins pop up as well as red streaks. As of today he's mainly been gasping towards the top of the bowl we put him in (removed him from the 10 gal tank 2 nights ago) Any hope for saving this guy!? Not sure about the water parameters for the tank we have our fish in. Haven't seen anything unusual with the others but do we need to treat them with anything or change water? Any insights appreciated! Picture of the sick goldfish and our tank attached.