771290 is for the newer model compressor (black head caps)

In Aeration Acres Up to 6 acres

and it's replacing chemicals like copper sulphate

The diffuser material is durable and cleanable

5"D Cooling Fan Yes 1 Mounting Pole Required

Kasco 8400AF Pond Aerator Pond Aerators 771290 is for the newerThe Kasco 8400AF pond aerator is a powerful tool to help increase circulation and oxygenation in a pond of 2 acres or less. Due to it's aggressive bubbling action, it has a very high transfer rate of oxygen into the water. The 2 HP motor draws 9. 0 amps on a 240v power supply. Minimum operational depth is 20" making it a great tool for even very shallow ponds. Like all the Kasco aerator packages, this one includes a float and two 50 braided nylon