Hi everyone! Sorry it has been so long since I posted last!
My gold colored fantail goldfish Cherry is very sick again.
His symptoms are: not eating or very low appatite, reduced activity, at the moment he has barly done more than breathe today just stayed in the same spot), he has some discoloration on the top of his nose and the sides of his gills (it is actually on the gill flap just before the opening, it is more of a strip than a blotch of a dark drown, the discoloration on his nose is the same color). He also appears to be missing or have damaged scrals in the middle of his sides on both sides. When I moved him there seemed to be like a feather strand of a bright red sticking out of the side, I believe he may have been bleeding. Also right next to one of the spots with the ingured scales was a white spot. It didn't quite look fluffy like fungus but more like an ick spot.
What I have done: After I noticed he was ill I moved him with some of the tank water from the 20 gallon tank he was in into a 2 1/2 gallon tank by himself. My other two fantails have not been showing any symptoms and still have not. He has his own heater and air bubbler. Temp is maintained about 75 degrees. I have given him Coppersafe and Maracyn-2 and a 1/2 tsp of aquarium salt. (I read on the packages that they can be used at the same time). He does not have a filter in the tank at this point because I would have needed to use a new carbon insert wich can keep meds from being as affective. Tomorrow the last dose of Maracyn-2 is due.
Changes since being in a smaller tank with meds: He seems to have only gotton worse. Moving less than when I first placed him in the 2 1/2 gallon tank and eating almost nothing. :< If he has eatin I have not witnessed it. I have even tried his favorite food/snack without him even turninghis head to look at it when it's right next to him.
What do you suggest I do? I think I should do a series of small water chages and add the filter since the water is very merky right now because of the meds. Should I start another treatment of Maracyn-2? In the past he has had flukes - which are a kind of worm that fish get. And when I saw the danaged scales I was concerned about it being caused by flukes again but no evidence of that has come to light.
Please help me and Cherry.

Me and his friends Pongo and Perdi don't want to lose him.