



Help, betta fish is sinking and breathing heavy
My betta fish is having a hard time swimming, he always sinks to the bottom and floats onto his side. Since he’s sinking I think it’s a swim bladder issue but I’m not sure how to treat him. I noticed this last night because he wasn’t sleeping in his usual hide, instead he had shoved him self in between a log and the side of his tank, when I stirred up the water around him he swam up really fast and then back down and in between two plants to hold himself up, this morning he was no better so I set him up the hospital tank in the photos. He also didn’t eat dinner Saturday, but I figured he was just not hungry because occasionally he will refuse dinner and just eat breakfast in the morning, but then he started showing lethargy signs on Sunday and got worse very quickly. He has had finrot for three weeks since I got back from vacation, but I haven’t been able to successfully treat it yet. Currently his tank has a silk plant, hide, heater, and airstone. If I need to add anything else I will. I have methylene blue, kanaplex, and paragaurd on hand but I’m not sure if any of these will treat him or if I need to order something else. What can I do to help my fish?
I did a water test with the API masterkit, nitrites, nitrates, and ammonia were all 0.