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I did a simple test to estimate the amount of detritus my tank produces and how much of it is missed by the skimmer.
Last weekend I vacuumed all my accessible sandbed thoroughly and cleaned 20Kg of live rock in the sump of all detritus.
Today I vaccumed (40cc) 1.4Oz. of detritus from that same sandbed and cleaned (50cc) 1.7Oz from the 20kg live rock.
This volume is like two matchboxes full of detritus plus the skimmer got emptied twice.
I'd estimate that the skimmer removed similar or slightly less detritus than what the other two trapped.
I have (150kg) 300 pounds of live rock and a (3cm) 1" shallow sandbed in my 400g system.
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