Good day All,

I regularly feed the koi fish at my work place and noticed some strange things occuring with 2 of the fish. The attached video shows it, one has its scales flaking as well as weird brown things forming near the gills and the other has small orange like boils all over the body as well as white spots in certain places, the video might not be very clear as it doesn't allow me to upload a file bigger than 8mb. I would appreciate it if someone could explain what could be wrong with them and point me in the correct direction to treat them.