Thats the problem mate we have to go with both your going to get flashing because the fish feel irritated by the water conditions we have to take care of this fungal outbreak because it will be also in your pond remember what I said about spores ?
I'd start by a bit of a water change "which I'm doing on our own pond as we speak", get your filters back on track and take care of the fungus all at around about the same time which I dont like .
But if your fish are starting to flash sit on the bottom and have a covering of fungus (the last three things you reported prior then it has to be fixed rapidly, I would also cut the number of goldfish by at least half because 100+ is too many
Dave
I'd start by a bit of a water change "which I'm doing on our own pond as we speak", get your filters back on track and take care of the fungus all at around about the same time which I dont like .
But if your fish are starting to flash sit on the bottom and have a covering of fungus (the last three things you reported prior then it has to be fixed rapidly, I would also cut the number of goldfish by at least half because 100+ is too many
Dave