We would like to buy fish farming machinery,such as 1,Paddle Wheel (motor) 2,Air Blower (dif..hp) 3,Vortex Blower 4,Root Blower 5,Air Pum6,Air Stone 7,Battery Pum8,Hydro Meter,Dissolve oxyzen Meter,Meter(0% to 100%)Scan,Refracto Meter,SWoil 9,Test Kit