Introducing Goldfish?

[needhelp]

My niece has had one goldfish in a 1 gallon bowl for nearly a year now and it has thrived. It's quite a lot bigger (and has a gorgeous tail!) and she has just changed to a tank which is a little over two gallons. she's only young so she can't really afford to get a tank and her parents have no room. Would she be able to introduce a new "friend" (goldfish too, of course) to the tank without one killing the other or any related problems?

[jaberwocky]

as long as it is of similar size. sometimes smaller fish get picked on but as there is only going to be two i cant see any problems.there are other types which are ouite attractive such as shubunkin.

[Susie Strawb]

I wouldn't recommend putting another fish in a two gallon tank, it's too small really especially for something like a shubunkin which should really be kept in an outdoor pond. They might look like they have plenty of room but they produce a lot of waste and another goldfish on top of the one she already has will produce even more waste. She will probably find the water needs changing more often and it could lead to health problems for the fish. Sorry to put a downer on things but I learnt from experience!