sorry to hear that bad Marcus. If blood come out from the gill, then it have been attacked by either parasite or a heavy content of bacteria at the gill . In this case nothing you can do. The white tuffy thing is SAP. it eat the wound no matter where the wound is. The fin rot is by too much bacteria in the pond, or the immune system of the fish is weak. A complete water change, clean up filter then a shotgun follow will get all back. Please read my post on shotgun method. Fish disease unlike human, not complicate at all. Keep your finger crossed. After you do both, salt to .4% in 2 weeks will help relax your fish and boost up them inmune system. thanks for that ,i think it might be a parasitic infection brought in by the new fish because thats when the problems started ,the fish are then becoming weak allowing bacterial infections to start .so i think i will invest in a microscope :) i wiil continue treating them with anti parasite stuff for 48 hours ,then do a water change ,then try salting for a few weeks . on a good note one of the small fish today that looked like it might be heading the same way as the others was feedig like mad ,it couldnt get enough lol thanks again Mark

sorry that i said .4% it's .3%. invest in a scope is the best idea a koi keeping do. Once you have it, you master Koi disease! Always keep pond clean, with every meaning of it. no plants, no devices, elevated wall, change water regularly, not much large tree around and a roof. that will do it. But that time we will have a problem: i will miss you then. Bye. ha ha ha you wont get rid of me that fast ,i have alot to learn :) thank you samantha :)