i have a 10 gallon tank with 4 goldfish, 2 dragon fish, and 1 pleco. recently i noticed that one of my goldfish had red streaks by/on its fins.. now 3 of them have the red streaks (counting the first one.) whats it from and is there anyway i can help them?? and also my one fantail goldfish (chalupa) which doesnt have redspots keeps floating upside down like hes dead but hes alive he'll move around and stuff and then turn upside down? is there anything wrong with him or is he just amused with being upside down? thanks for any answers anyone has.. i dont want my babies to die!