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.
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wouldnt the air just come back up the tube rather than going threw the gravel and sponge as it should