Angelfish swimming nose up

[Alessandro1994]

I recently purchased to low quality angel fish at my LFS and 1 week in they are swimming nose up. What could this be w sign of and how can i fi it?

 

[Passionfish]

I recently purchased to low quality angel fish at my LFS and 1 week in they are swimming nose up. What could this be w sign of and how can i fi it?

Looks like swim bladder disease. I know how to diagnose it, but IDK how to treat it.