1. Sense organ

As we always go to the market to buy rice in our daily life, we should choose those with good color and color, no mildew, no caking, no bad smell. In addition to the smell of fish, there is also a fishy smell for the top grade products.

2. Fat

The requirement of fat for koi is higher, and the digestibility of fat is 10% – 20% higher than that of protein (70-80%). Therefore, the condition of fat in feed becomes an important evaluation index.

3. Feed granularity

According to the size of the fish, 80% of the bait for juveniles is required to pass the 100 mesh analysis screen; 80% of the bait for the juvenile fish is required to pass the 80 mesh analysis screen; and 80% of the adult fish is required to pass the 60 mesh analysis screen. In short, the bigger the fish, the bigger the feed particles.