6 year old telescope goldfish sick

Mar 15, 2010
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Hello, I need help with my goldfish. It's a quite big 6 year old telescope that since the last week got like a tumor or an inflamation next to one of its eyes, I separated it from the rest of the fish and put it into a 40 liter tank with antibiotics to avoid any infection changing half of the water of the tank every 3 days; a couple of days ago the inflamation bursted (it seemed like it was full of water) leaving a pice of skin hanging (which I haven't touched yet) and I changed half of the water everyday since that day and put antibiotics in the water in order to keep the enviroment as clear as possible to avoid any other diseases. My goldfish never had such a disease like that but today I noticed that the telescope is floating on the water and it's unable to keep itself in the bottom (as it usually does and like almost always since I got it), I have never seen him floating like that and never had problems related to bladder or anything. The goldfish eats very well as usual, I generally feed the goldfish with tetra fin (dry food) that I manage to sink into the bottom (the goldfish never liked to eat from the top of the tank, it always ate from the bottom).

I'm planning to feed him with boiled peas for a couple of days to see if its confition improves, it has been a very healthy goldfish since I have it (6 years aproximately) until now. Can anyone give me any suggestion to treat my baby?

Thank you.

Aaron.