Color. The shrimp feed with better quality is light gray-brown, uniform in color and lubricious, but the color is affected by the color of the raw material, and there will be changes in depth, which cannot be regarded as the main quality factor. odor. Better quality shrimp feeds have the smell of fish, shrimp or salmon. When the seal is closed for a long time, it cannot smell a pungent odor, nor can it smell oxidized. Clear but not turbid indicates that the fishmeal is of good quality; thick fishy fishy taste indicates that the fishmeal and fish oil used are more poor in quality. Appearance requirements. The surface of the shrimp feed is smooth and clean, and the fracture surface is smooth, with uniform length and uniform particles. Smash fineness. The shrimp feed was crushed with a glass bottle and the fineness of the crushed was observed. Good shrimp feeds are finely crushed and there are no obvious large particles. Water resistance and softening time. The shrimp feed is soaked in water. After 2 to 3 hours, the shrimp feed expands and does not disperse. It does not sew, break, and does not “blossom†at both ends. After soaking in water for 30 to 40 minutes, it is fully softened, and the hand-kneaded shrimp feed has no hard heart, and the shrimp feed that is not spread out when the flat shrimp feed is kneaded is of good quality. Induced feeding. With a small homemade net, a small amount of shrimp feed was submerged into the shrimp pond. About half an hour later, a small net was put on the water surface to observe how much shrimp feed was left on the net and how much shrimp there was in the net. Good shrimp feed, shrimp will not have eating disorders, used to eat normally.
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