The bubbles are approximately 3mm in diameter

Aerates Ponds/Lakes Where No Electricity Is Available - For ponds up to 4 acres and up to 25' deep

Electronic over-current protection

CE marked (the KM-200C does not carry CSA recognition)

AirMax PS40 Aeration System With Four Diffusers No Airline - 115V Surface Aerators The bubbles are approximately 3mmFor ponds up to 4 acres in size. The PS40 will aerate 1 acre 3 to 5 feet deep 2 acres 5 to 9 feet deep 3 acres 9 to 12 feet deep 4 acres 12 feet deep or greater Please contact us for a free aerial mapping if you aren't sure of what aeration system will fit your pond the best. Kit Includes: Silent Air Cabinet and Pump Four four membrane stick diffuser plates Fittings, clamps, and airline found below in the related products tab. *Airline and fittings