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Martin wrote that book 50 years ago <<<< 1st print 1989, that makes it 28 years ago.
In Sprung & Delbeek Volume 3, “denitrification and nitrification can happen in close proximity of each other <<<< yes, that is why live rock is practicle, because it has the ability to do all three, unlike bioballs, or Marine Pure for example.
I agree about live rock being a poor de-nitrification method <<<< noted
but what does that have to do with this discussion <<<< you have removed your most effective method of inorganic nutrient removal - macro algae fuge, as stated in your OP. I thought my queeries were relevant. Apologies if I have mis-interpreted what you wanted to discuss.
Moe's book is certainly still relevant, and to finish, I'll just quote from his book: - "Denitrification bacteria are also present in the deep crevices and pores of the rock, but assuming the tank contains a fair number of animals, the denitrification capacity of the bacteria in the rock will not take the place of active algae growth and a properly designed and functioning denitrification filter device."
I'll look forward to your updates on sponge & filter feeder progression & effectiveness.
Good luck.
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