I am sorry about Zipper too.
I have a common of a foot, and I felt sorry for him all alone. So I just added a gold koi that is suppose to stay around 6 inches. He is cute as the dickens. He has catfish whiskers. As I think I mentioned, the Goldie tank is outside. It is 60 usg.
I would love to have another fancy goldie tank. But I will never again mix fancys and the larger more boisterous goldies. They don't mean to hurt the fancys. They are just nudging with that hard nose of theirs and doing what they do with their own kind. But the Fancys just are not fast enough or hardy enough to handle the rough play. I have lost about 5 fancys and maybe $200 of fish. One Lady Oranda was almost a foot long and very pretty. She suffered much from the common before he finally did her in.
I am delighted that Fred is looking like he is recovering. Sorry to say that most of what we learn is in the doing. We really can't do a proper job with posts. It is mostly best guesses, and mine will be different than anothers. I just had a crisis in a tank where the heater was accidently turned up rather than down. I chose one treatment, but it was the wrong one. Fortunately I was able to get it corrected with a best guess from a major pro and the tank is recovering with one loss. One I would not have lost had I not made the wrong guess and missed the temp change for so long.
So keep updating on Fred as this is of interest about Fred! and for treatments for future reference