Two days ago I set up a new tank for Tiny Tina and put her in it. I had seeded it a week prior with substrate and water from her old tank to build a bacterial community for it and fed the bacteria ammonia daily. I did a 100% water change and emptied the toxic, nitrite and nitrate rich water from the seeding out prior to placing her in it. I then siphoned 2 gallons of her old tank water into the new tank to help acclimatize her to the new chemistry and tank and filled the rest of the new tank with aged and tannin stained water. I acclimatized her to her new tank for just about an hour, eyedropping new tank water into her floating cup every 10 minutes or so. Her old tank was a 5.5 gallon unfiltered, heated tank. Her new tank is 6.6 gallons, has a built in filter and is heated. I would turn the filter off if I could, but the LED light is built into the filter, and I cannot lose one without the other. The current does not appear to bother her, she is a strong swimmer and is not buffeted by it.
Her PH is 7 - 7.5, nitrates, nitrites, and ammonia are all at safe levels, her temperature is at 27-28 degrees celsius. She normally is excitable, surfing all the time on the glass and very explorative, always excited when I come up to see her. I woke up today to find that her dorsal fin and ventral fins are very clamped, and she's spending a lot of her time hiding. She never used to go in a decorative resin pot before, and now she doesn't come out except for air. When she does come out, she darts, and does not surf. She also flared at her reflection when I shined a flashlight on her, which she has never done before.
Her scales appear to be flush to her body, but I cannot get a very good look at her and I certainly cannot photograph her. She does not appear to have any ragged fins, no fungus appears to be growing on fins, scales, gills, or lips. Her eyes are normal. Her colour isn't washed out. She ate when I fed her. But she appears listless. I am very worried that if I don't spot something soon she may worsen and I'll never be wiser as to what caused it.
Anyone with any opinions on this matter, please let me know. I wish I had more information, but I simply cannot offer anything at this time.