So I went with
@GBBUDD advice (because I am afraid of the all caps if I did not) and added goldfish this morning. Just 5 Shubunkins (pond pack) from Next Day Koi. Did some reading and I should be ok adding this late in the season and have them make it through the winter. They are only 5-6 inches long. Look very tiny in a 3700 gallon pond, lol.
Unfortunately one of the fish was doa. It was floating on its side in the bag, put it in the pond right away as they advised in that situation but there was no reviving it. I know you will all be surprised that I, as an attorney, would be too honest. I ordered the five pack but they sent six including the dead one. I emailed them that one had died in transit but I did get five which is what I ordered. Less honest person I guess would have said nothing about having the five live ones and try to get a credit for the dead one, lol.