Wait what?!! I didn't know sponge filters could work with the output above the water if it's driven by only an air pump! Seriously? That little spout of water is from the airpump?!??! What airpump do you have?
Yep, Whisper 10 air pump, it's an older model so it's a little grey box instead of the new ones they sell at petco and stuff. But it's reaaaaally quiet