Thank you all for the thoughtful comments.
I am very fond of keeping things simple and inexpensive. The resale value on aquarium gear is low and the market is sluggish.
I typically use a plastic bin of floss with a plastic grid as my prefilter, and that gets changed as often as it gets dirty.
Everything like lava, pot scrubbers, gravel & ceramic Bio-media etc comes after, and the poret comes last.
I'm using it only as a bio-filter.
I looked on the Swiss tropicals website and they have some stuff I hadn't seen before. I see they have a new plan for a poret-only sump. It's emerged, and has multiple layers. Looks entirely doable, but I'd still put floss on top.
I don't have any official mattenfilter yet. Just these Bacto-surge things (as seen in my Sump photo above) in differing sizes.
. . . . I looked at your "schematics" and compared it to PYRU's little drawing and chuckled to myself. But that's the engineer in you, attention to detail and such. . .
Yeah it's not optional. First time you miss a detail you find that out.
By the way I did not make that drawing just for this discussion, nor did I make it in preparation to build the actual sump you see in the photos. I just went through the hardware store and picked up a bunch of stuff, and built that thing on the Fly.
But I made the drawing later so I could explain to somebody over on Fishlore how the sump worked.
With that being said, you do have me absolutely pegged. I would go out to lunch with five other engineers and they all wanted to talk about baseball. I wanted to talk about the theory of transactional quantum mechanics.
The possibility that spooky action-at-a-distance extends with the concept of time being a dimension, and therefore spooky action can occur across time . . .err...sorry....
Oh look! Ziegfeld Follies with snails!
