I don't think the death rates in their experiments would apply to an established tank; other factors would come into play in a newly set up tank.
The thing I found most interesting is that all tanks experienced a similar level of nitrate reduction- shallow or deep substrate.
It made me re-think the value of plenums and DSBs. I fact it should make us question what we think we know about how nitrates are reduced in our aquariums. Nitrate is obviously being reduced in areas other than anoxic zones
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