Ok, Im a newb when it comes to diseases because luckily all I've ever encountered was ich. I got my midas last week and I noticed something on his tail. He has also been flickering his fins like somethings been getting to him. I dont' know if the thing on his tail is serious or not but needed you guys to look at it. I started treating the tank with melafix and pimafix today, added some salt and the temp is at 82. thanks for your help