I do not know if a koi will survive 1.008, I am just suggesting that they are a bottom feeder that can evolve to live in non desired areas.
I'm not here to be a 'teacher' I'm just here to have fun and see others with a similar hobby.
I like seeing other folks that have actually done things, not talk about them.
Am I trying to prove a point about carbon dosing? No, it's been done before.
Do I need a ff to remove the doc? Nope.
Interesting mario personaly after all these years of keeping koi I'd say yes they are designed through evolution to be bottom feeders and have bottom facing ,mouths because of it.
Koi are omnivorous opportunistic feeder's, meaning they need both protein and plant matter in their diets and will look for these nutrients anywhere they can get them and giving them an all round nutritional diet
As such we find them in their foraging for food acctually making use of all levels of the water table to find and eat food.
They have taken every advantage of this as have their cousins the Goldfish who are just as opertunistic,
Weve seen our own koi giving an orfe a run for their money at feeding times and orfe are built for the job with mouth designed for surface eating and body built for rapid speed with a darting hit the food run retreating into the depths
Cyprinids feeding at all levels isnt an evolved thing as such, its more a learned opertunistic thing.
Which you will find applies to many of the cold water species of bottom feeders you choose read about .
Dave