Will koi fish stay on the floor?

Usually koi fish will live in groups, but there will also be layered swimming. Koi fish, who is big, consumes a lot of oxygen and eats a lot, so he likes to swim on the upper floor. Those who are small or sick will swim on the lower floor and swim on the bottom floor at rest. So there will be layers.

See if koi fish is out of the group. Healthy koi fish will gather together. Koi fish's loneliness is a harbinger of illness. In severe cases, he swims slowly and looks like a sleepwalker. More seriously, he can't control his swimming advance and retreat. When anchovies or fish fleas are parasitized, koi fish will condense in a corner of the pool.