So I searched for 'Gravity' and didn't find anything. Wanted to know what you guys thought of doing a gravity fed scubber below my DT and above my sump. Pro's/Con's, any gotchas. Here's what I've come up with so far and what makes me think it might not be the way to go but would love to be talked into it. I think I read in another post Bud mention that the hf model was 50 gph/in of screen. If I have a 90 gallon tank and I want to turn over 1200 gph that means I need 24 inches of screen then correct? That's a lotta screen! Reminds me of my old SM100 replica DIY jobber I made (that worked GREAT btw!) but I guess that's not the recommended size anymore... Also, what would plumbing look like? I'm planning on drilling the tank and doing the herbie/durso/beananimal three pipe style overflow. Would a scrubber on the end mess with the siphon action somehow? Do I just slap a union valve on it and connect it over my sump? Thoughts?