What's the transparent plastic pipe in the aquarium? A black plug is plugged in. Do you want the water in the pipe?
Don't let the water out. That's the Venturi air inlet. The pump runs to keep the water up.
The nozzle with the plug is higher than the water surface, and the other end is inserted on the thin manifold of the water outlet of the pump. Do not use oxygen alone
Connect to the diving pump, then you can put it outside and screw the things up to make oxygen. That's what I have
