If it is on a large water surface such as a reservoir, you can use 6.3M-7.5M Generally speaking, crucian carp is not too far away. 4.5M is the best. It is also the most commonly used.
There are usually 3-5 hooks. There are many small melon seeds and crucian carp in the pond, so 1-2 is needed. All right. If there are many giant crucian carp, hehe, using No.6 can prevent the fish from running away. Usually 3-5.
Fishing depends on the environment. Only by using the hook flexibly can you return home with a full load.