The difference between the Sensen water pump hqj and jp models is that their functions are different. The function of the Sensen water pump hqj is to include a water inlet cover, which is removable and washable, and can increase oxygenation and air intake. The Sensen water pump JP series multi-function upper filter box filter tank Fish tank water pump three-in-one oxygenation filter pump. The fish tank submersible pump is generally installed in the fish tank as a water exchange for the filter device. Its function is to lift the fish tank water to the filter tank, then pass through various areas of the filter tank, and then flow back to the fish tank to play a circulation role. When a submersible pump is used as a filter, the flow rate needs to be 3 to 5 times the total volume of the fish tank. For example, for an aquarium with a capacity of 100 liters of water, it is better to choose a submersible pump with a flow rate of 300 liters/hour. Similarly, the water suction port also needs to be For protection, set up a larger mesh isolation port to prevent fish from being sucked.