Aquael oxyboost plus aerators membrane pumps continue the 30 year tradition of the production of membrane aerators by aquael compared to other competing devices they are distinguished by modern design excellent workmanship and high productivity the oxyboost plus line of aerators includes four models ap 100 plus apr 150 plus ap 200 plus and apr 300 plus the numbers correspond to the maximum performance of the respective device expressed as liters of air that can be pumped through it