Yes I finally gave up on it after fighting it for almost a year. The measurements are too tight in my opinion to work as intended. With the intake being on the front of the skimmer with water leaving the bottom of the skimmer, unless you have it in the first slot lined up with the overflow it will not function correctly. But I never tried that, for as poor as it performed I more worried about removing 1 of the mechanical filtration methods. I had mine in the 2nd slot, never "broke in" and always just spewed microbubbles, would rarely get and good skimmate, always very watery and would overflow often. If you follow the path of the water from the overflow putting this in the 2nd slot is forcing water into the out flow of the skimmer and around the body where the intake is so far from ideal. Lets all those micro bubbles with a direct path to your return pump. Fought adjusting up down, adjusting the dc pump and could never get it working correctly. Multiple attempts at contacting Tunze, they have great customer service but ultimately could not correct the issue. I decided to get an aquamaxx HOB 1.5, it does come with its own set of issues/challenges to get it working on a JBJ45 it performs night and day better.Hey, I have the tunze 9004 also but it doesn’t work very well and makes a lot of micro bubbles, did you have the same problem

