JOEBO Electric Submersible Pump Silent Aquarium Fish Air Pump Oxygen Tank Aerator Flow Prump for Marine Plant Sump Pump (Color : 3.5W a Set)

Note:1. This is a product with reflux valve design. 2. The motor still won't stop running even the water outlet is blocked but the reflux valve will be opened and water circulates in the pump in that situation.

• Test silence or not, please be sure to take a good oxygen tube after the test, if you do not test directly into the gas pipe, the gas flow at the outlet will produce a sound of friction.
• Regularly clean or replace the oxygen tube to maintain a steady oxygen output.
• Can be widely used in sewage sampling, large flow rate of liquid transfer and low noise for the workplace;
• Large and super large aquarium, small swimming pool, reservoir filling water, fountains, and other purposes.