I prefer a shallow bed of mixed coral rock and sand to accommodate multiple species of fish and inverts.
I currently have a 1 inch deep mixed bed of coral rock and course sand that literally changes shape and size daily to the gobies, pistol shrimp, sand sifting snails, sea cucumbers and power heads. I rarely have any buildup of bad stuff due to the bottom being moved so much.
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My aquarium is nothing but a smorgasbord for my cats.....
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