The instructions for Rowa Phos call for 100ml of Rowa for a 100gal tank, therefore 55ml of Rowa will be good. I usually add an extra 10ml as I loose some when I rinse it with RO water to get the finer particles out and reduce the initial brown water.
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Rebuilding....
Concept Custom 50gal 24x24x20, herbie overflow, Radion g2, 20 gal sump, Bubble Magus NAC 7, MP10 WES, Speedwave 1320 return.
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