I have six comets in my 2000gl pond and they have been there for about a year and a half and are 6 to 7 inches long some of them are super dark red/orange in color and are absalutely beautiful. I also had an oranda and a ranchu but unfortuanatly our neighbors cat wanted them for dinner....they just don't swim fast enough to escape. I would love to see pics of your gold fish though that would be nice!