Mitch said:
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So how are you exporting YOUR phosphates?
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That is a very good question. Myself and many other reefers don't have a whole lot of macro algae for nutrient export. It would be really helpful to devise a general idea of how much macro would be needed to export a given amount of PO4. To answer Alan's question.....
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get the likely effects a sheet of nori (unconsumed) would have on 100 gallons of water?
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With the same sized piece or nori you'd get a 0.0026ppm increase in 100 gallons or 380 litres of RO water.
An interesting experiment would be how much PO4 a 2.8 gram (equivelent size to the nori) piece of macro algea can export in the same 24 hour period. Then multiple that by the size of tank.