Hi everyone from hartlepool, iv kept koi for a good few years now and try to do my best for my koi, but iv noticed two of my fish have what looks like white fungus on one of them its just one patch on her body but the other seams too have more on it but more on its fins than its body,, my pond is 22.000lts and enclosed, il attach a picture for you, iv never really had any problems before this, i use a nexus 300 filter as I'm disabled, anyway enough of the babble,, could anyone please give me a point in the right direction on what is the most effective treatment, ps, I don't have any plant life, but I do have a sturgeon,
Thanks in advance, kind regards
Alan

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