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Saltwater Aquarium Guide Reef-keeping magazine
Filtration & Protein Skimmers

BRS GFO Reactor Review: Phosphate Control Made Simple

An overview of running granular ferric oxide (GFO) phosphate media in the BRS media reactor.

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Granular ferric oxide (GFO) is a widely used phosphate-removal media. The BRS reactor is designed to tumble the media gently so that water passes through it evenly.