DO1 1 GPH (60ml/min) DO2 2 GPH (350ml/min) DO3 3 GPH (370ml/min) DO4 4GPH (320m/min) DO5 5 GPH (520ml/min) DO7 7 GPH (610ml/min) DO10 10 GPH (800ml/min) DO12 12 GPH (1000ml/min) DO14 14 GPH (1200ml/min)