They have grown too big for the tank – I have a pond outside with other goldfish in – will the 2 who have been inside be OK in there, or are there ‘inside’ fish and ‘outside’ fish. Thanks in anticipation of your advice!

Goldfish are extremely hardy. put them in a bag and float it in the pond first so that they can get used to the temperature, leave them for about two hours then release them. just make sure your pond is netted so that cats and birds etc don’t get them