This is really hard but I have decided to transform my koi pond into a water garden with goldfish. Its a big pond and I did not know that the guy who built it for me did things that were not fish safe. Not enough filtration by any means and a pond that size needed two skimmer boxes. I have been trying to add veggie filtration but the truth is that bog filtration needs to have a surface size 1/3 of the surface of the pond and mine is not even a little there. Cleaning a pond this size (23'x43'x 4' deep) is massively expensive and if I do it myself, intensive and extremely time consuming. It simply was done wrong and I am admitting this before any of the koi are affected. My fish stock is low but they are breeding pretty fast. I have contacted my local pet store owner who is a sweet person and he is going to tell the koi ponders in my area that I am giving my koi away. Some of the fish are quite big and nets will only harm the fish so we will plan a few days to do this by draining the pond. Then people can come and we can seine them.( Cherokee Joe, I would like to keep your catfish but I am not sure if maybe they will need a better water quality than a goldfish can handle). Once the pond is drained, I will spend maybe a week cleaning it and then I will set it up for water lilies and hardy lotus and goldfish.
I have to be honest about something else too. I have no vet here who works with fish. I am very attached to my cats and dogs and I have an awesome vet. I believe in being responsible for any living thing I caretake. Where I lived before, I watched KHV kill off my entire koi pond. I am not willing to watch an animal suffer again at my hands if I can help it.
This is going to be painful but I truly believe that it is the right thing. Wish me luck!