I have a beautiful 10" white fan tailed goldfish in my pond. I think she has the "Dippsy" w/ the enlarged belly for a year now. She seemed to be very normal w/ no particular issues except for a very large belly. How can I find out if she has the Dippsy or not? I read that Epsom salt treatment is a possible cure . I am debating whether I should move her to a 20 gal tank and try the treatment. Of course I am also afraid that this new environment could stress her out kill her.