The SunSun CHJ-1500 aquarium pump 1500 l/h with 25 watts is a pump with very good efficiency - flow rate per watt. If you compare the power consumption of the CHJ aquarium pump series with other aquarium pumps, you will see that the trend towards saving energy has been correctly recognised and well implemented. Aquarium pumps are endurance runners. Filter pump / aquarium pump: Let the advantages of these aquarium pumps convince you. Depending on the litre capacity, the aquarium pumps are particularly suitable for large or small aquariums. To prevent the filter from overflowing in conjunction with these powerful pumps, the use of a Y-adapter is recommended. If such an adapter is used as a by-pass, the output can be split between another UVC aquarium clarifier or filter. SunSun has incorporated an inflow control in the design of the pump: Regulate the inflow to the aquarium pump - steplessly. Further strengths of the CHJ aquarium pump series are the very quiet motors and the suitability for fresh water and salt water. The flow rate of the aquarium pump must be matched to the size of the filter. If the delivery rate of the pump is too high, the filter will overflow and this should be avoided at all costs. The circulation cycle of the aquarium and the dwell time of the water in the filter should also be taken into account. Depending on the type of use, the optimum circulation cycle depends on various factors: Fish stocking, aquatic plants, desired water clarity. Of course, other components of the filter circuit may also need to be harmonised.