How to use the air regulating valve of fish tank

If air guide is used, there are several ways to use it:

One end is connected with an air pump (or extension tee, regulating valve, check valve, etc.). ), and the other end is connected with an air outlet device (such as sand head, sand bar, water demon, etc.). ).

One end is connected to the air inlet of the three-in-one pump, and the other end is placed above the water surface.

One end is connected with a gas source such as a steel bottle, an aluminum bottle (or an extended tee, a fine-tuning valve, a check valve, a bubble counter, etc.). ), and the other end is connected with a refining device (such as a refiner, a diffusion barrel and the like). ).