I started my first aquarium (freshwater, 55-gal) in January of this year. At that time I had six zebra danios. After a couple of months I saw that this one was getting picked on by two others. They would chase her/him as they do in the morning but it got to the point that this one got skinnier and skinnier and finally just layed at the bottom while the other two nudged her (will use the feminie to keep it simple).
So, I netted her out and put her in a 10-gallon hospital tank. She got bigger and stronger over time. Then, I noticed that her belly turned into a bulge (see picture posted in my "hospital tank" aquarium). I went to my local fish store with a picture in tow (the one featured in my hospital aquarium) and they had me do a couple of things to determine if she was egg bound or if it was a tumor. One was to turn the tank temp up and the other was I think to put in a certain ratio of epson salts. Nothing happened.
She has been swimming and eating all these months. For a little more than a week though she lays on her side at the bottom in a corner most of the time. At first I thought she was dead, but she wasn't.
When she swims it's circular. She has had a different look to her while she swims because of the big middle even before. I fear she is in a lot of pain. Her eyes seem to bulge some. I have dropped pellots in because they sink to the bottom in case she can eat.
I don't know what to do and will appreciate any help. She just isn't passing away on her own and, again, I fear she is suffering greatly at this point. Now I am a person who only kills moisquitos. Otherwise, any bug in my house gets toted back outside rather than killed. I don't know if I will be able to do it but I think it needs to be done. Please help...:(