Hello, I noticed today when feeding my 10 gallon guppy tank with 4 male guppies that one seemed to have a curved spine that was described in an article. The guppy is breathing heavily and he seemed to be one of the more active fish but I noticed yesterday he was breathing air from the surface so I did a 50% water change on the whole tank. Today upon noticing the curved spine, I took him out and put him in my spare 3 gallon tank with a heater, no filter. I do not know what to do or how to treat him, I added a bit of aquarium salt because that is all I have on hand. The others seem to be fine although one of them is not eating as much as I would like. Please help!! Has anyone successfully treated this?? Or even had these symptoms???