Hi there wondered if i could have some of your expert veiws on my problem, which is over the last 2 weeks i have lost 2 large koi both were found on the bottom of the pond dead no marks on there body but inside there gills were some patches of grey slightly green, that is the only thing i could see wrong with them, and now i have a 2 foot grass carp layed upside down but still alive, all my fish have been in the pond about 9 years with no problems it is well established nothing has changed so its a mystery to me, maybe i should mention that 3 weeks ago they all stopped eating which is also very unlike them, sort of thinking the worst
