hey! so my king betta oneday is about 2.5 - 3 inches long. a few weeks ago, i noticed he had fin rot. although he didn’t seem to have fin growth, he started to be less lethargic. i thought that with good water changes, he’d be fine. i was mistaken. now, he seems to be floating to the top and sometimes flipping on his side ( he keeps himself upright pretty well through. it’s just that he can’t stay down). This happened/ started a week ago. I set up a 2.5 gallon hospital tank (he’s not yet transported into it). I have maracyn 1 and aquarium salt. I need tips… anything! this is my first aquarium ever. I think I was the cause of this bacterial infection because I medicated in his main tank… killing the beneficial bacteria off… and i didn’t bother to test because my tank was already cycled. god only knows what the ammonia was at while i was doing weekly water changes. i’m sorry for this long paragraph but i am freaking out! my fish is literally my heart.