09-12-2012, 06:11 AM
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The Jaubert method is putting a plenum, or almost an airspace, underneath the substrate. Most people using this method would modify an undergravel filter to make a space between the bottom and sand bed. In this plenum an anaerobic bacteria resides that completes the nitorogen cycle. Nitrates are broken down by this anaerobic bacteria into nitrogen gas that will leave the aquarium naturally.
I use a 4"+ sand bed to have the same effect as the plenum, as denitrifying bacteria (anaerobic) resides in the deepest part of that sandbed. That is why you do not disturb the sandbed as the aquarist; you do however use reef creatures (snails, gobies and starfish) to turn the top layer over and clean the sand.
Last edited by wake49; 09-12-2012 at 06:14 AM..