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Aquavitro phosfiltrum is a specially formulated, high-density, granular
ferric oxide (GFO). It will rapidly remove phosphates and silicates from
both freshwater and saltwater and will not release them back into your
aquarium. It is much harder and consequently much less fragile than
other GFOs, so it will not break apart into fine particles in your tank.
It has the highest binding capacity of any phosphate remover on the
market, so it will last much longer before it needs to be replaced. Its
distinctive dark brown color identifies it as the premier product in the
industry. This 50 gram size treats 75 gallons.
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