[Subsea]

Originally Posted by Twinfallz

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.

The reason that I mentioned Sprung and Delbeek reference to nitrification & denitrification happening in close proximity of each other was because it negated the biological need for live rock. I would like to address Martin Moe’s statement about needing a “functioning denitrification device”. Why do I need to remove nitrate from the water as a free nitrogen gas. Why not feed my corals & bacteria with this nutrient source. Remember, nutrient recycling.