Water changes may not fix the ammonia if there is any, especially if it hasn't gone through a full cycle yet. It could be a number of things, or it could be your catfish just getting used to their new home. They're usually hardy fish from what ive seen, but i'm not too sure at 3 inches.
You should have a good sleep and check on them in the morning. Get a test kit and let us know how you go!!
You should have a good sleep and check on them in the morning. Get a test kit and let us know how you go!!
