One of my Sarasa Comets has been having swim bladder issues. I have placed them in a medbay tank for some days now and they have stopped floating to the surface, but now they are just sinking to the bottom. Last night thinking they were better I released them back into my main tank and they were not doing so well. They are constantly erratically swimming then sinking back down to the bottom. The fish has also refused to eat for the past week or so, what should I do to help them?