Guys... I've a way too... which happens to be affective towards my gold fish.. actually once there's a fish floats or summersoalts, it's due to bladder infection.. and to overcome it is by reducing the intake of food.. and try feeding green peas only.. and thing green will do exp spinich, lectuce... BUt all of it must be boiled... to soften it... Consider this as vegetarian diet... It works with me and i hope it works for u too...