I have a glofish tetra that is swimming sideways. Not on it's side but sideways like a crab moves side to side instead of head to tail. He does still sometimes swim straight. Of all of them he's been the most aggressive and it seems like he does it when I approach the tank but it might be because he's trying to swim the fastest at that point. He's kind of an . I'm going out of town for 15 days and the person watch my fish won't be able to give them medication while I'm gone. The fish is at least 1 1/2 years old, the tank is 77 degrees, the nitrates are .0ppm, nitrites .25 and ammonia are .25. About 2 months ago I lost my purple glofish to when the insides decided to come out. This one isn't having the same symptoms though that one did before the burst. I tried uploading a video and it's saying the file is too big???