telescope goldfish

Hello. I have a 55 gallon tank and my Telescope gold fish is about 5 inches and he seems to have a issue with his eye. I really don’t know what’s wrong with him but he is a black and orange color fish and his eyes are black but the issue it seems like one of his eyes is peeling and turning like...

I was planning to get a goldfish tank. My idea was: - 30-40 gallon tank with 2 goldfish. - plants that are safe for goldfish. -sump system. -Panda butterfly telescope goldfish with either calico thai oranda or red and white butterfly telescope. I have some questions: -how big do thai orandas...