Does live rock remove nitrates?

[Aquattro]

Originally Posted by sphelps

I don't think much of any denitrification processes are occurring in our aquariums, in the ocean yes, but it's just not feasible in the aquarium.

So following along this thought, where did my nitrate go? I'm talking about long running systems never showing detectable NO3, even feeding "well" with PE mysis, daily nori, etc.

I like to believe the rock is doing it, but how does the water reach the anaerobic areas within the rock at sufficient turnover to process the entire tank?
And I'm not certain you need a carbon source with these bacteria, now you're gonna make me have to hit the books again.