Low Wattage Haiyang Submersible Pump (OHF)

In providing proper filtration for a tropical fish pet (flowerhorn) aquarium, an over head filter is a must. A much more powerful filter than air driven filtration. I used to have few of Precision product installed. It works fine but when we consider the wattage of the motors, it varies from 20 to 25 watts. Considering it works 24/7, i would consider it too much for it really affect the outcome of the electricity bill. Looking for solutions, i went on to look for other brands that offers same or better quality.