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 Pumph 6,Air Stone 7,Battery Pumph 8,Hydro Meter,Dissolve oxyzen Meter,Ph Meter(0% to 100%)Ph Scan,Refracto Meter,SWoil PH, 9,Test Kit Show More