Yesterday I noticed the new girl betta I got had slashes on both sides of her head. The only thing that I can figure out that happened is that she got her head stuck in the holes at the bottom part of my sumersible filter. I am guessing that I have to buy a hospital tank to put her in? Do I leave it bare or can I put decore in it? Also the water changes and added salt or no?? I will try to post some pictures. The ones I took were to blurry. Please help me to help my lil girl!