I think it is because you make the bubble count in such a hurry.
When you adjust the bubble, it takes time to have the effect after 10-40 seconds. For example, if you see the bubble count too low, you adjust it faster, cannot see it improve, so adjust more, but actually, the first adjustment is not yet fully shown, so finally, you are make the CO2 released like the air pump.
Try to make the adjustment, then wait 10-20 seconds to see if it is ok, then make anothe adjustment if needed, then wait.
I got the same problem you have before.
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