I decided to plumb the system on top of my tank so I would get the full benefit of all the baby pods that breed in the system each week. This is causing a ton of bubbles to enter the tank, but they really don't make it past the far right rock tower. Actually... It's kind of cool looking lol... For now I'm going to leave it as is, I kind of like the lit bubble show lol. You can see the unit sitting on the top right of the tank And here you can see where my plumbing isn't all the way out of the water.. I will redo it later... this was a quick install. I know it must be coincidence.. But I already feel like there are a little less diatoms on my rocks and my sand bed!! I'll get a pick of the screen tomorrow night to check the status of algae growth in the scrubber. If it has started to grow there it would make sense that the small amount of diatoms I had are starting to vanish.