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dsupper
4 years ago

This “Stab” is the outlet from which the filtered water flows back into the aquarium.

It is always useful to apply it below the water surface in such a way that the water surface is moved!!

Thus enough oxygen comes into the water, but at the same time the already few Co2 which is in the water is not “blubbered”. (Sonst there is no plant growth).

Nils7364
4 years ago

As you want, but if you don’t have CO2 (from which I look), you should see that the surface is moving, otherwise it doesn’t matter.