I don't know where to start this, but Caligo, my oranda, does not seem well lately. She's not very active, she rests and swims about 50-50 and she floats upsidedown now pretty much everytime after she eats, no matter what or hom much I feed her. At first it only happened off and on with pellets and freeze dried food but I stopped giving those a while ago and now it happens even with flakes and peas. I also noticed that she has a dark spot on her side... it had been a little dark spot that she had for a long time, (I'm not sure when I noticed it first, at least a year ago if not longer...I thought it was just a dark scale or something) but lately I noticed the spot seems bigger and like it's pushing up her scales a litttle from underneath... I think maybe it's a tumor or something internal... is there anything I can do?