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IME, organic carbon dosing reduces orthophosphate and nitrogen inlcuding some nitrate. Wouln't count on the "redfield" 16:1 ratio though as it's an enmasse measure and the organisms in play may vary significantly from it.
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Tom
Current Tank Info: Tank of the Month , November 2011 : 600gal integrated system: 3 display tanks (120 g, 90g, 89g),several frag/grow out tanks, macroalgae refugia, cryptic zones. 40+ fish, seahorses, sps,lps,leathers, zoanthidae and non photosynthetic corals.
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