Hello, all! It’s been awhile since I’ve been on here. I just got a new betta on Sunday and today he is already dying. The first couple days he swam around but was hiding a lot. Today, he cannot swim and is stuck at the bottom breathing very hard. I have no idea what happened, but I noticed his gills were blackish. What could have happened to him? I uploaded 4 photos of him that show his progression. Please help!!