Once all of the larger koi moved to the new pond, the butterfly koi stayed in the smaller pond with the little koi. These koi seemed to be spawning regularly so we didn’t want to have weird fry in the new pond. However I felt sorry that these koi did not have as much room to swim.
The solution came on Craigslist. I found a listing where someone was asking for koi for a housing complex. It is for seniors who are able to live independently. The lake is huge and the seniors enjoy feeding the koi. They only have 15 koi so far and are looking for more. So today we took our butterfly koi and released them into the very large pond. I think they will do well in the pond and the residents will enjoy them.