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A good topic for sure...
When I hear this a good inspection of the gills is reccomended. Check the gills they should look like raw meat red.
Another scenario from past experience was too look in the mouth. I found a small sore on the upper roof of mouth closer to lip. This bothered the koi a bit so it kept moving its mouth.
Also string algae can get caught in gills and or a heavy slime coat can coat the gills which make it extremely hard for the koi to breath..
Just some things to take a look at and not rule out..
Joe
__________________ It's a living creature (chit happens) |