What tropical fish can live in a goldfish pond for summer?

[fishboy123]

Hello, this may be a strange question but have a 1200gal goldfish pond in my garden and I was wondering if I could put some tropical fish in for the summer. I live in the uk is it warm enough? If so what fish would work

 

[nirbhao]

Guppies.

 

[EOGoldfish]

I'm assuming there is goldfish in there already? Generally most fish that won't fit in their mouth will be fine as long as they aren't overly sensitive.

 

[fishboy123]

Could a fetherfin catfish survive?