Hi! I'm new to caring for betta fish as well as bettafish.com. My only real experience with fish in general originates when I was a lot younger when I had my fair share of goldfish. Now I'm 19 and live in a college dorm and I thought having something to care for would really liven things up. Sooo, here I am, proud owner of a Halfmoon male betta fish. I've done a pretty good amount of research on the little guy, I've gotten him some marimo moss balls and a heater as well as other decor. I have yet to get a filter (I know, horrible) but it should be arriving today or tomorrow. He's in a 2.5 gallon tank. I got him a little over a week ago, last Thursday to be exact, and I've recently noticed these past couple of days that he's begun to just sit idle in the top corner of his tank. He only moves for food or if I cause some water movement with my finger at the surface. He sits above this fabric plant I picked up from Petco that he'd grown to like. He used to like to wedge himself between it and the tank and swim around it, but now, like I said, he just sits atop it not moving for hours on end. I've done two 25% water changes with conditioned water since getting him (one today and one two/three days ago), I've switched out his food since he doesn't like flakes but nothing seems to be getting him out of this corner! Googling the issue I get answers ranging from: "Ammonia poisoning, your horrible fish keeper!" to "Oh he seems to have found a nice hang out spot ". From what I can tell with my unexperienced fish keeper knowledge he doesn't seem to have anything visually wrong with him. He's always seemed kind of lethargic but never isolated himself to the corner. Any ideas or help would be appreciated! I've grown to like him a little too much and I'm a bit (very) worried and would be sad (devastated) if anything were to happen to him. Thank You!