Patent ID: 7318901

Claim:
A diffuser for oxygenating water by providing micro bubbles in aquaculture installations for marine organisms in the sea, wherein the diffuser is attached to an equipment for oxygen gas production and oxygen delivery, which optionally may be produced on the spot and stored in a suitable tank ( 4 ), wherein said diffuser is a hose ( 5 ) comprising a perforated supply hose ( 6 ) and at least a perforated distribution hose ( 7 ), and wherein the supply hose comprises fewer perforations/holes/pores than the distribution hose and wherein the perforations/holes/pores in the supply hose ( 6 ) are located along its entire circumference and in the longitudinal direction, or in a row/rank in the supply hose's ( 6 ) longitudinal direction, and that the perforations/holes/pores in the distribution hose ( 7 ) are located along its entire circumference and in the longitudinal direction, and wherein the supply hose ( 6 ) and at least one distribution hose ( 7 ) are arranged with parallel axes located in abutment against each other, wherein the supply hose only has perforations in the contacting surface between said supply hose and the distribution hose(s), with a resultant correspondence between these contact surface perforations in the supply hose and the distribution hose.