Dry Type or Wet Type Fish Feed Extruder?
The fish feed pellet extruder can be divided into two types: dry type fish feed extruder and wet type extruder. The differences and features of the dry type extruder and wet type extruder:
1. Dry type fish feed extruder does not need the steam boiler while the wet type is with the conditioner and need to equip the steam boiler. So the dry type fish feed pellet machine is cheaper and easier to use and operate.
2. The feed pellet made by wet type fish feed pellet machine is more smooth and with better quality because the material is ripen and mixed enough in the conditioner compared with the dry type extruder.
3. The capacity of the wet type fish feed pellet machine is higher than the dry type feed pellet machine, so usually the wet type fish feed machine is suitable for large feed pellet factory while the dry type fish feed pellet machine is better and economic for the small and medium size user or factory.
Fish Feed Pellets: To Sink or to Float?

Commercial fish diets can be classified into floating (extruded) or traditional sinking (pressure-pelleted) pellets. Both floating and sinking feed can produce satisfactory growth, but some fish species prefer floating, others sinking. There are both pros and cons both in the two types of pellets. However, the use of floating pellets provides more advantages compared to sinking ones:
1. Reduce Waste.
Sinking pellets that remain at the bottom of the tank will often get lost and wasted. However, the floating feed pellets can retain its shape, even after being in the water for many hours, uneaten feed are still intact.
2. Decrease Disease.
Sinking pellets that remain at the bottom of the tank will eventually rot, which may give rise to proliferation of bacteria and spreading of harmful fish disease.
3. Convenient Observation.
Another reason to feed floating (extruded) pellets because the farmers can directly observe the feeding intensity of his fish and adjust feeding rates accordingly. Determining whether feeding rates are too low or too high is important in maximizing fish growth and feed use efficiency. However, sinking pellets will fall into the bottom of the tank, even fish can not find them.