Omg thank you for posting this... i have mine coming out of the water at the top and it kinda looks a mess lol but still work, is this best to put under the water all told? (i only have mine in a butket of water for a test!)Heres mine. In the Picture it's in my 55g but it's going to go into my 10g invert tank.
wouldnt the air just come back up the tube rather than going threw the gravel and sponge as it should