I just got a new Betta today and thought that I had followed the proper guidelines to preparing his tank, etc. I've owned Betta's before (though it's been many years), but I was inexperienced at the time and didn't really give them nice big tanks, etc. Even so, they lived about 3 years and were healthy and seemed pretty happy. I had them in large bowls before, with no filter system, so this part is new to me.
This new guy I got today, is just hanging out on the bottom of the tank, hiding behind his plant. He won't eat. (Which I realize can happen sometimes.) He's not actively swimming or exploring. His fins are fairly pinned. He's just laying on his side/stomach on the rocks in the corner.
My biggest question is... How do I know if the filter in my 5gal tank is too strong for him? I don't know if he's just lounging and adjusting, or if the current is too strong for him, or what?
The temp is fine, water is well-conditioned and treated, levels are within normal range.
Is he just depressed? Is the filter flow too strong? Is he just adapting?
Any advice welcomed and thanks ahead of time!