Hi there,
I have a couple of red-blue columbia tetra's and one of them is having difficult time swimming. It keeps sinking and I think the problem is with the swim bladder, or something like that. Most of the time its tale is pointing bottom of the aquarium and the head is pointing towards the top. Is there any kind of solution to that. The problem is for couple of moths and it's not result of a fight or something.

If somebody can help , I'll appreciate it