I have one cory that’ll go to the top and look as if he’s struggling to swim properly, linger up there with his mouth to the surface for a while, and then go back to normal. But he isn’t darting up like the others, he’s hanging out up there. I wanted to say it looked like a swim bladder thing but when he goes back to the bottom every now and then he seems fine. I have 10 other cories and they all are acting normal I tested my water (50gallon tank) and my ammonia was kind of high ~0.25. My cycle crashed when I added too many fish and it’s recycling now. I just did a water change, around 50%. The pic shows my water parameters now. He’s still doing it a bit, not quite as often. It’s just odd that he’s the only one doing it. I can’t attach the video but I can add pics if that’ll help. Any ideas?