Question
Are there any small goldfish, koi, or other pond fish?
(I need fish that won't grow above 5 inches)

Answer
Hi Miriam,

Thank you for your question.
It, in fact, will also depend on the size of your pond.
Because if it is to shallow it will freeze over during winters and will kill the fish.
I'm not sure from wich area in the world you are, however check out the local pondstores for advice to be sure wich are the best for yor area.
I'm directly thinking on comet goldfish, however growth up to 15 inches.
Fantail goldfish will grow up to 8 inches.
Mosquitofish and black moors are the smaller once in size and maybe available?
Good luck and happy pondkeeping!

Kind regards,
Raf