Howdy everyone. I haven't been to this forum in a long time. Anyway i'll just get to the point. I'm getting ready to leave the house and i see one of my fish just seems to be just laying on the bottom of the tank. I thought he was dead, but he started moving. His body is in an arch shape and it looks like his breathing is really shallow. At first i thought maybe it was a swim bladder problem but now i'm not sure. He just lays there, taking a gasp every now and then. Have i lost my buddy? I did some water tests and despite the water being a bit hard there was nothing unusual. The other fish are not affected. He won't eat and he doesn't struggle when i try to touch him. (I had to pick him up and move him so i could keep an eye on him) Any suggestions? (or hard truths)