What's the difference between dry type floating fish feed extruder et wet type floating fish feed extruder equipment?The biggest difference is the wet type fish feed puffing machine need a steam boiler while the dry type aquatic feed  extruder doesn't. In this case, the dry type extrudeuses pour aliments pour poissons is cheaper than wet extruder, and the feed pellets made by wet type pellet extruder is much smooth and with better quality.