<a href=showthread.php?s=&postid=15747577#post15747577 target=_blank>Originally posted</a> by Kenfuzed
I made my own using a plastic jar (spice jar or seachem product jar). Drilled a hole in the bottom to slide in the air tube, then drilled a couple dozen tiny holes in the lid. Then I took cotton floss (cotton balls will work) and lightly packed this into the jar. This also works to hold a small spoon full of carbon to purify the incoming air. Super silent!