I would strongly considered putting in some flathead minnows and some spawning habitat for them you will be amazed at how much forage it will create in your pond this will give you plenty of food for your other fish. If you give them some time by themselves there will be food of all sizes for your new fish and give them a better start. Just make sure you acclimate the new fish when you introduce them I have had very good luck I just introduced four dozen large Fhm(fatheads) about three months ago and I estimate that I now have approximately ten thousand now I stocked two hundred BG and one hundred res and found no dead fish