BTW, I used to be prepper. After our last winter freeze in February I understand ponds in Alaska, Missouri, Chicago now.
Ponds that were overstocked with fish lost all their fish.
Deep narrow ponds lost all their fish.
Flower Power, my 13 ft diameter pond I had 26 koi and I lost zero. Did lose power for over 24 hours, but I thru a big piece of pondliner over the tray with the filters so they didn't freeze hard, apparently, and my pump sat low, so it didn't freeze. I kept an air hole by heating water on my wood stove and pour it on the pond to keep a hole for gases to escape. When the power came back on the pump started.
But I think the reason I didn't lose fish though was that the big wide area meant a small thin bottom area of carbon dioxide, it spread out and didn't kill my fish.
I have discovered also that when goldfish and koi cross breed you get large goldfish with no whiskers that swim like koi and are mostly black. I've got to euthanize half a dozen that a customer produced, because I am afraid if I give them away someone will turn them loose in a lake, and their reproductive rate is high enough in ponds. Our lakes have enough problems... so back for the clove oil recipe. I'm only in the office in the winter and the hottest part of summer.. It was nice to read this thread.