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GFO

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.

Filters
  • On Sale 15%
    Bulk GFO Phosphate Reducer (1 lb)
    On Sale 15%

    Bulk GFO Phosphate Reducer (1 lb)

    Kolar Labs

    $31.49
    $26.77
    This GFO is the Original GFO Bayoxide E33. High phosphate levels are a recipe for disaster in saltwater aquariums. It is a nutrient for nuisance algae and also hampers the formation of calcium skeleton in corals. There are several different methods for...
  • ROWAphos GFO Phosphate Removal Media (250 g) - D-D The Aquarium Solution

    ROWAphos GFO Phosphate Removal Media (250 g) - D-D The Aquarium Solution

    D-D Aquatics

    $21.99
    Rowaphos is the leading phosphate removal media for marine and reef aquariums. Rowaphos will not leach any phosphates back into the water. RowaPhos is a unique man made ferric hydroxide material specifically produced for efficient removal of phosphates,...
  • On Sale 15%
    Phosban (1200 gm Bucket) -  Two Little Fishies
    On Sale 15%

    Phosban (1200 gm Bucket) - Two Little Fishies

    Two Little Fishies

    $84.99
    $72.24
    Synthetic ferric oxide hydroxide granules with an extremely high capacity for adsorbing phosphate from saltwater and freshwater. Also adsorbs silicate, and does not release adsorbed substances. Recommended by Julian Sprung for long-lasting and easy...
  • On Sale 15%
    Bulk Super GFO High Capacity Phosphate Reducer (1.5 lb)
    On Sale 15%

    Bulk Super GFO High Capacity Phosphate Reducer (1.5 lb)

    Kolar Labs

    $61.73
    $52.47
    This High Capacity GFO is the Original GFO Bayoxide E33.  All of the fines and dust have be prefilltered out to give you a heaver more effective product. High phosphate levels are a recipe for disaster in saltwater aquariums. It is a nutrient for...
  • On Sale 15%
    Bulk GFO Phosphate Reducer (2 lbs)
    On Sale 15%

    Bulk GFO Phosphate Reducer (2 lbs)

    Kolar Labs

    $56.69
    $48.19
    This GFO is the Original GFO Bayoxide E33. High phosphate levels are a recipe for disaster in saltwater aquariums. It is a nutrient for nuisance algae and also hampers the formation of calcium skeleton in corals. There are several different methods for...
  • NUVO PurityPack Replacement Filter Media (Desktop) - Innovative Marine

    NUVO PurityPack Replacement Filter Media (Desktop) - Innovative Marine

    Innovative Marine

    $9.99
    NUVO PurityPack: Replacement Filter Media [Desktop] (1) High Performance Fiber Ball (1) High Capacity Coarse Granular Ferric Oxide Pouch (1) Premium ROX 0.8 Carbon Pouch Fits: Fusion 10, Fusion 14 Peninsula, Fusion 20, Fusion 20 Peninsula, Fusion...
  • ROWAphos GFO Phosphate Removal Media (100 g) - D-D The Aquarium Solution

    ROWAphos GFO Phosphate Removal Media (100 g) - D-D The Aquarium Solution

    D-D Aquatics

    $14.49
    Rowaphos is the leading phosphate removal media for marine and reef aquariums. Rowaphos will not leach any phosphates back into the water. RowaPhos is a unique man made ferric hydroxide material specifically produced for efficient removal of phosphates,...
  • On Sale 15%
    Phosban (150 gm) -  Two Little Fishies
    On Sale 15%

    Phosban (150 gm) - Two Little Fishies

    Two Little Fishies

    $22.65
    $19.25
    Synthetic ferric oxide hydroxide granules with an extremely high capacity for adsorbing phosphate from saltwater and freshwater. Also adsorbs silicate, and does not release adsorbed substances. Recommended by Julian Sprung for long-lasting and easy...
  • On Sale 15%
    Bulk Super GFO High Capacity Phosphate Reducer (3.3 lb)
    On Sale 15%

    Bulk Super GFO High Capacity Phosphate Reducer (3.3 lb)

    Kolar Labs

    $108.35
    $92.10
    This High Capacity GFO is the Original GFO Bayoxide E33.  All of the fines and dust have be prefilltered out to give you a heaver more effective product. High phosphate levels are a recipe for disaster in saltwater aquariums. It is a nutrient for...
  • On Sale 15%
    Bulk GFO Phosphate Reducer (4 lbs)
    On Sale 15%

    Bulk GFO Phosphate Reducer (4 lbs)

    Kolar Labs

    $94.49
    $80.32
    This GFO is the Original GFO Bayoxide E33. High phosphate levels are a recipe for disaster in saltwater aquariums. It is a nutrient for nuisance algae and also hampers the formation of calcium skeleton in corals. There are several different methods for...
  • On Sale 15%
    Bulk Super GFO High Capacity Phosphate Reducer (7 lb)
    On Sale 15%

    Bulk Super GFO High Capacity Phosphate Reducer (7 lb)

    Kolar Labs

    $188.99
    $160.64
    This High Capacity GFO is the Original GFO Bayoxide E33.  All of the fines and dust have be prefilltered out to give you a heaver more effective product. High phosphate levels are a recipe for disaster in saltwater aquariums. It is a nutrient for...
  • On Sale 15%
    PhosBan (454 gm) -  Two Little Fishies
    On Sale 15%

    PhosBan (454 gm) - Two Little Fishies

    Two Little Fishies

    $59.23
    $50.35
    Synthetic ferric oxide hydroxide granules with an extremely high capacity for adsorbing phosphate from saltwater and freshwater. Also adsorbs silicate, and does not release adsorbed substances. Recommended by Julian Sprung for long-lasting and easy...
  • AF Phosphate Minus GFO (1000 mL) Dust Free Prewashed - Aquaforest

    AF Phosphate Minus GFO (1000 mL) Dust Free Prewashed - Aquaforest

    Aquaforest

    $32.99
    An efficient medium for fluidization filters. Dosing too much food and supplements can lead to high phosphate levels. Due its unique properties, Phosphate Minus effectively reduces phosphate and silicate levels in marine aquariums. Its adsorbing...
  • Phos 0.04 Phosphate Remover (950g) - Fauna Marin

    Phos 0.04 Phosphate Remover (950g) - Fauna Marin

    Fauna Marin

    $49.99
    Phos 0.04 is a unique mixture of granular media that safely removes phosphates and yellowing compounds for the aquarium water!  Regardless of how much is used, phosphates will never crash out to zero.   A special feature is...
  • On Sale 15%
    Bulk GFO Phosphate Reducer 5 Gallon Bucket (20 lbs)
    On Sale 15%

    Bulk GFO Phosphate Reducer 5 Gallon Bucket (20 lbs)

    Kolar Labs

    $403.19
    $342.71
    This GFO is the Original GFO Bayoxide E33. High phosphate levels are a recipe for disaster in saltwater aquariums. It is a nutrient for nuisance algae and also hampers the formation of calcium skeleton in corals. There are several different methods for...
  • Phos 0.04 Phosphate Remover (475g) - Fauna Marin

    Phos 0.04 Phosphate Remover (475g) - Fauna Marin

    Fauna Marin

    $29.99
    Phos 0.04 is a unique mixture of granular media that safely removes phosphates and yellowing compounds for the aquarium water!  Regardless of how much is used, phosphates will never crash out to zero.   A special feature is...