tried it on my skimmer. i usually get a gallon or so every 2 or 3 weeks of dark green/black liquid. the skimmer produced 1/2 gallon in only 24 hours after modding the beckett. still running a mag12, but the drain had to be opened up a little and i was able to let in more air with the air valve because the bubbles stayed smaller.

i plugged the original 4 large holes with pieces of plastic and super glue gel, and then drilled about 30 new holes with the smallest bit i could find in my shop, 5/64. if you do this, be careful to readjust your water level. before readjusting mine, it pulled a gallon of water out of my tank in about an hour.