Hello,
I have a new betta (had him for about a week) in a 3 gallon tank. He has plants in there to hide in, and he eats normally. He is very bright and his fins are not torn or injured. I am perhaps just being paranoid, but he swims around very fast near the front of the tank sometimes, and looks like he wants to fight the glass. When he does this I also notice his breathing is very fast. Is he sick? I'm worried he has internal parasites of some kind, but he shows no other signs of being sick...
I may just be a paranoid new fish owner.