1) Don’t use this submersible pump without water, put it into water fully before using. Keep the water clean when using, or clean the pump regularly like 1 time in a month, or add some olive oil on the rotor after using for a long time, to improve the pump’s lifespan and good performance.

2) If this pump suddenly stop working or make big noises, which may be caused by debris blockage, like mud, garbage, sea salt, etc. Please clean it with clean water before using!

3) Insufficient power and insufficient frequency will affect the submersible pump’s flow rate and lifting height.

4) The maximal water flow 850GPH refers to the biggest flow rate without using a water pipe. When using with a water pipe, the flow rate will be less than 850GPH.

5) Don’t use in salt water.

6) The operating temperature range: 40-115℉

7) All the pumps will go through water testing before packing, if the pump you receiving has a little water in it, don’t worry, it is left in water testing, and this pump is normal and new.

8) The inner shaft will be with a little bit lubricant to ensure the rotor working well. If you are raising sensitive fish or aquatic plants, please use the water pump in other tanks for a short time, then move it into your sensitive fish tank.

9) Our products are made by big batch producing, parts of them may exist a little flaw, it can't be avoided completely. We will try our best to provide you a good and useful pump, but if they are not so perfect as you expected, please give some tolerance and understanding, really thank you very much for it!