Aerators are the devices used in aquaculture systems to increase productivity, dissolved oxygen and ensuring better survival. Various aerators are used to meet the requirements of aquaculture. In the present study, rectangular plastic plates were selected and perforations were made. The design parameters used in design were hole diameter (d): 0.001-0.004 m, plate spacing (h): 0.1-0.4 m and flow rate (Q): 0.5 - 10 m3/s. The response surface methodology was adopted to select the optimum design parameters. The plates of dimension 0.3 m × 0.5 m × 0.14 m were selected and the diameter of each hole was kept as 2 mm. Aeration experiments were conducted in a rectangular FRP tank of dimension 1.6 m × 0.6 m × 0.55 m, filled with 500L of water. A submersible pump was used for lifting the water from tank to the perforated plate on the top. When the water falls through perforated plates, it becomes finer in size and these particles absorb more oxygen from air and falls back to the tank. It increases the dissolved oxygen content of the water. Perforated plate aerator has the advantage of cost effectiveness, low maintenance and easy to handle.