Would No Flow On LR Work Like A DSB?
 

Just kinda mulling around some ideas for natural denitirication and ofcourse have come across DSB systems. I know they work by having low oxygen for the bacteria to do there job and I was just wondering if I took a large area in my sump and filled it with very porous rock and made a baffle so it had minimal to no flow on it would it have the same end result of a DSB or would it just act as any other live rock in my system?

No, all the water in that compartment would have to be devoid of oxygen, it would have to be sealed from the atmosphere like the area in a DSB or a reactor type denitrator.

LOL so much for that idea... Guess ill do a 6" DSB