This paper aims to study the possibility of using the leaky pipes as a diffused-air aeration in the aquacultural systems. Air pressure in the pipe,
standard oxygen transfer rate (SOTR), and standard aeration efficiency (SAE) were determined to evaluate the performance of these pipes under different air flow rates (14.1-106.0 m3/h) and water hydrostatic pressures
(0.5-2.0 m H2O) for five and ten pipes on the line. The results indicated that the air pressure increased with increasing of both hydrostatic pressure and airflow rate. The effect of the hydrostatic pressure on the air pressure was
higher than that of the air flow rate. The standard oxygen transfer rate (SOTR) increased with increasing the hydrostatic pressure in the aeration tank. Using ten leaky pipes on the air pipe caused an increase in the standard oxygen transfer rate (SOTR) compared to the use of five pipes treatment. The standard aeration efficiency (SAE) decreased with increasing the air flow rate. It could be concluded also that, the effect of air flow rate on the SAE is greater than that of the hydrostatic pressure. The results revealed also that the SAE increased with increasing the number of leaky pipes.