Hi guys, I am hoping someone could give advice on how to help my fish. I think he's getting sick; immediately after feeding I noticed that he was bloated and had red splotches on his body. They are mostly on his belly and lower side areas. He also seems to be inhaling/breathing heavily compared to the my other fish. Its hard to determine wether the red splotches are on the surface or below the surface of the scales, but it looks more internal than external to me. He may have had these symptoms prior to feeding but I did not notice them. I've never encountered this issue before with any of my fish, and it doesn't appear to be effecting any other fish. The fish in question is a male Harlequin Rasbora. I'm doing a water change immediately. Any advice on how I can save my fish is much appreciated!