I just received some bettas from thailand. all of which are adapting well to their new environment. But i have this one male betta where he is just sitting in the tank vertical sometimes. I notice he didnt eat very much or at all when I tried to feed him the first few days when I got him. Today he ate as much as the other bettas so that was a good sign. What bothers me is that he is not as active as the others and i occasionally find him swimming on the bottom of the tank a lot or just close to the surface of the water. right now hes kinda vertical towards the top of the water.
Whats wrong with him?
All the bettas are getting the same treatment of water and they are all fine. I use tap water with water conditioner plus a lil bit of aquarium salt.