Flukes
About a month or so ago, I noticed one of our Koi had become lethargic and had some red tint colouring to his skin. At the time I was and still am very unfamiliar with flukes. After we noticed he was really starting to show he wasn’t well, barely moving and not eating we had a koi specialist visit the pond. He scraped the fish and said it came back positive for flukes. We went and bought treatment off him immediately and treated pond same day. Unfortunately the koi passed away that morning. A week after we were advised to do secondary treatment to kill any eggs that still remain etc. Now another one of my koi’s is showing a red tint to skin, and three of my biggest goldfish are now showing same behaviour as first koi, very lethargic, not eating and remaining at the bottom of the pond not moving. Has anyone had experience with fluke infected pond? I feel like the whole pond is doomed and they are all just going to start dropping like flies and i’m not sure what to do. We have had these koi for 30+ years and never experienced this devastation,