The only tank that I have with a sump is a 75G Jaubert Plenumn on top with a 30G mud macro refugium. In the last two weeks I have removed grape caulerpa from refugium, installed eggcrate over the mud. Placed dead rock over eggcrate, then seeded refugium with cryptic sponges. In anticipation of a live food source from refugium, I have added some gorgonions and sponges to display tank. Tank is in flux due to many changes but here is a picture.
Intelligent Design/Natural Filtration
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