I have a 10 gallon that I have 4 cories and a fancytail goldfish in. I had 2 but the other just died. I don't think this one is going to live for more than a few more months. They both got dropsy really bad and it was amazing they lived. Well, they haven't been the same since. This one is still healthy. My question is could I put a few sailfin mollies with the goldfish or should I wait for this one to die? I've never tried goldfish with anything other than bottom feeders. If I have to I could get a 5 gallon for him.