Sera has had their line of air pumps for some time now and 2 of the 3 models received a nice performance boost. The models getting more efficient are the 275 plus air, and the 550 R. The 275 plus air wattage has been reduced from 6 watts down to 4 watts and the 550 R has been reduced from 12 watts down to 8 watts. These new models also have been retrofited with a filter drawer allowing you to clean the intake area further increasing the efficiency of your pump. The price on the 550 R tops out at €35 ($48.69) and models below that including the 275 plus at €22 ($30). Expect to see these pumps arriving in Europe and the UK.