I recently found out that I have only one goldfish left in my small pond, which is quite saddening, despite the fact that I have never paid much attention to them. I decided to catch it, and I have been keeping it in a tank that contains water and pond weed that comes directly from the pond that it was in. What should I do with it? Its mouth is too small for it to be able to eat any of the food that I have been giving it, and it does not seem to be very active. Thanks in advance for any help.