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What does GFO do exactly and why do I need it?
GFO or Grandular Feric Oxide (rust) is used in a fluidized media reactor to remove phoshates from your aquarium water. Phosphate is the number one killer of aquarium coral and phosphate is also a major cause for algae blooms in our aquarium. Just like weeds in a garden, algae used phosphate as a fertializer. Controlling phosphates on a continual basis is one of the key elements to maintaining a beautiful saltwater aquarium.
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