What should I do if the water inlet of the aquarium three-in-one pump is too loud?

There are four ways to solve the problem that the air inlet of the aquarium three-in-one pump is too loud:

An air intake control valve is added to reduce the air intake.

Put the position of the water pump down to increase the pressure of the water pump, thus reducing the gas volume.

Plug a piece of cotton at the air outlet, or connect a section of trachea with an air stone.

Dip the inlet pipe into the water to avoid leaking out of the water, so that there will be no bubble sound when entering and leaving the water.

In particular, the dissolved oxygen in the fish tank is related to the contact area between the water surface and the air, so it is not necessary to have bubbles to increase oxygen, and water flows to increase oxygen. So you can completely use the fourth way. Some fish friends like bubbles not only for increasing oxygen, but for viewing.