1. As this aquarium pump is submersible, and need to be put into water fully before power on to avoid the aquarium pump burning out. Prohibit no-load running.It would shorten its lifespan and lead tomaking loud noises when running in the air for long time, Whenchanging water, please disconnect power supply.

2. Due to all the pumps need to be professional water testing by our manufacturer before shipment, if the water pump you receivedhas a little water,please don't worry, the little water was left fromprofessional water testing, it is a normal phenomenon. It is new and normal pump.

3. If the water pump is stuck by anything like Mud, garbage, sea salt, etc. need to be cleaned with clean water before use.

4. The inner shaft will be with a bit little little lubricant to ensure the motor is working well, If you are raising sensitive fish or aquaticplants, please use them in other tanks for a short time then move it into fish tanks. If the product suddenly stop working or make noises, which may caused by debris blockage. Please clean it regularly about, or add some olive oil on the rotor.

5.Insufficient power and insufficient frequency would affect the fountain pump’s flow rate. 400GPH refers to the flow rate without using a pump water pipe. If connected with a pump water pipe, the fountain pump maximum flow rate would less than 400GPH.