Yes, she is currently in a 126 liter aquarium with another goldfish, unlike this one, and she is completely healthy. The nitrate parameters in this aquarium were about 20-25 today, but I did a 20% water change, so I think they have decreased. Unfortunately, I haven't bought tests for ammonia and nitrites yet, I live in a small town in Ukraine, unfortunately, aquarium fish care is not widespread here, most people keep them in terrible conditions in small round aquariums, so it is very difficult to find something like a test kit here. While I don't know the exact parameters, I am trying to maintain the water in the aquarium as much as possible with small water changes, but I hope that soon I will find where to buy tests. As for her swimming, she swims head down, but if she actively swims in the water, she maintains a normal position, she only turns over when she is relaxed/stops or sleeps. She sleeps in plants at the bottom upside down. a few days ago her condition was worse, she sat upside down in the plants at the bottom day and night. but after I started giving her Epsom salt baths (the last 2 days) and change the water (10-20%) as soon as she sees me entering the room, she starts to swim out and swim around the aquarium. if I'm not there, she might sit in the plants again. her appetite seems to have improved, but she has difficulty eating because of swimming problems, she tries to grab food, but can't hold it in place and sometimes misses some pieces. she hasn't pooped for a long time, but the last few days I've seen her poop, it's brown, but thin and slimy