One of my female bettas in QT was doing really well for awhile now. Yesterday and today she would not eat. All this time I've had her, almost a week now, she has been eating the pellets. Since she wouldn't eat them, I gave her hikari pellets (I don't like that brand but if she will eat it then w/e) she ate one, and they're BABY pellets. Today I put a hikari one right in front of her face and she swam away.
She is also not as active as before and she doesn't seen to open up her tail as much as before.
She's temporarily in a 2.5 gal Unheated (room temp 72 degrees) until I put her into the sorority. Could it just be the cold temp bothering her? Should I worry? I did a water change 75% yesterday and I've been doing them every 2-3 days