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Old 01/14/2017, 06:27 PM   #7
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Join Date: Jul 2010
Location: Austin, TX
Posts: 1,624
Sponges are consuming the DOC produced by corals and algae and converting it into DIC aka HCO3-.

"Our crystal clear aquaria come nowhere close to the nutrient loads that swirl around natural reefs" Charles Delbeek
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