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At AquaCave, we offer some of the best selection and best prices on Aquarium Filter Media, Carbon, Biological, GFO, Biopellets, and media reactors, Algae Scrubbers, and Cheato Reactors, for marine, reef, and freshwater aquariums.

  • CO2 Scrubber Skimmer Lid 8" (C2C-200) CO2 Scrubber Skimmer Lid 8" (C2C-200) CO2 Scrubber Skimmer Lid 8" (C2C-200) CO2 Scrubber Skimmer Lid 8" (C2C-200)

    Reef Octopus

    CO2 Scrubber Skimmer Lid 8" (C2C-200)

    CO2 Scrubber Skimmer Lid 8" (C2C-200) A Perfect Lid for a Perfect Fit This special lid is designed to precisely fit a range of Reef Octopus protein skimmers with the intent to use it in conjunction with a CO2 Scrubber (RO-C2T-90) to draw out the...

    $40.99
  • Seachem PhosBond 1 Liter. Seachem PhosBond 1 Liter.

    Seachem

    Seachem PhosBond 1 Liter.

    Seachem PhosBond 1 Liter. Seachem’s PhosBond revolutionizes phosphate and silicate removal through a synergistic fusion of granular ferric oxide (GFO) and aluminuum oxide. This synergistic blend combines the best of both types of phosphate removers to...

    $40.99
  • CoralVue GFO 64 FL OZ.

    CoralVue

    CoralVue GFO 64 FL OZ.

    Phosphate Adsorption Media for Fresh and Marine AquariumsGranular Ferric Oxide commonly refereed to as GFO ideally suited for filtering out phosphate from the water column which promotes better coral growth and helps prevent algae outbreaks. This medias...

    $39.99
  • Seachem Matrix Bio Filtration Media, 4000 ml. Seachem Matrix Bio Filtration Media, 4000 ml.

    Seachem

    Seachem Matrix Bio Filtration Media, 4000 ml.

    Seachem Matrix Bio Filtration Media, 4000 ml. Matrix is a high porosity biomedia that provides efficient biofiltration for the removal of nitrogenous waste. Matrix media is a porous inorganic solid with an average particle size of about 10 mm in...

    $39.99
  • Coconut Shell Granulated Activated Carbon, 3 lbs.

    AquaCave

    Coconut Shell Granulated Activated Carbon, 3 lbs.

    Coconut Shell Granulated Activated Carbon, 3 lbs. Coconut shell-activated carbon offers a high surface area and an extensive micro-porous structure which makes it an exceptional absorbent of molecules that are more difficult to remove. Furthermore,...

    $39.95
  • ESV Granular Activated Carbon, 3.5 lb. ESV Granular Activated Carbon, 3.5 lb.

    E.S.V.

    ESV Granular Activated Carbon, 3.5 lb.

    ESV Granular Activated Carbon, 3.5 lb.ESV Granular Activated Carbon based on bituminous coal provides the best combination of pore size, large particle size, high surface area, low ash, and hardness for chemically filtering aquarium water. In addition,...

    $39.95
  • Tropic Marin NP-Bacto-Pellets, 500 ml. Tropic Marin NP-Bacto-Pellets, 500 ml.

    Tropic Marin

    Tropic Marin NP-Bacto-Pellets, 500 ml.

    Tropic Marin NP-Bacto-Pellets, 500 ml. An easy to use, biodegradable filter media for the effective removal of nitrates and phosphates For the most natural environment in the reef aquarium it is important to pay close attention to the mineral and...

    $39.95
  • Tropic Marin NP Bacto Balance 1000 ml. Tropic Marin NP Bacto Balance 1000 ml.

    Tropic Marin

    Tropic Marin NP Bacto Balance 1000 ml.

    Tropic Marin NP Bacto Balance 1000 ml. Mixture of selected organic compounds to promote the incorporation of nitrate and phosphate in supplementary biomass. The ratio of nutrients is ideal for corals, sponges and other invertebrate animals found in...

    $39.04
  •  AquaMedic AntiPhos FE GFO Media 1000 ml.

    AquaMedic AntiPhos FE GFO Media 1000 ml.

    Antiphos FE is an ideal media for selectively extracting phosphate from aquarium water, helping to reduce and prevent nuisance algal growth...Antiphos FE is an ideal media for selectively extracting phosphate from aquarium water, helping to reduce and...

    $38.95
  • Seachem CupriSorb 500 ml. Seachem CupriSorb 500 ml.

    Seachem

    Seachem CupriSorb 500 ml.

    Seachem CupriSorb 500 ml. CupriSorb is a powerful adsorbent of copper and heavy metals. CupriSorb will remove copper more rapidly and efficiently than carbon and is ideal for emergency copper removal. CupriSorb is a copper specific chelating resin...

    $38.95
  • Brightwell Aquatics Carbonit-X3,  450 gr. / 15.9 oz.

    Brightwell Aquatics

    Brightwell Aquatics Carbonit-X3, 450 gr. / 15.9 oz.

    Brightwell Aquatics Carbonit-X3, Triple-Action Activated Carbon Rapidly Removes Ammonia, Chlorines & Enhances ORP Activated carbon is a catch-all name for products that may be derived from coal, wood, or coconut shell, and which have undergone treatment...

    $37.95
  • CO2 Scrubber Skimmer Lid 6" (C2C-150) CO2 Scrubber Skimmer Lid 6" (C2C-150) CO2 Scrubber Skimmer Lid 6" (C2C-150) CO2 Scrubber Skimmer Lid 6" (C2C-150)

    Reef Octopus

    CO2 Scrubber Skimmer Lid 6" (C2C-150)

    CO2 Scrubber Skimmer Lid 6" (C2C-150) A Perfect Lid for a Perfect Fit This special lid is designed to precisely fit a range of Reef Octopus protein skimmers with the intent to use it in conjunction with a CO2 Scrubber (RO-C2T-90) to draw out the...

    $35.99
  •   PURA GFO Phos-Lock Filter Media, 1.75 lbs. (795 gr.)

    Magnavore

    PURA GFO Phos-Lock Filter Media, 1.75 lbs. (795 gr.)

    PhosLock is the benchmark German made ferric hydroxide media for total phosphate removal in all aquaria. Used all over the world, it is the product of choice for many critical water purity applications.PURA Phos-Lock Filter Media, 795 gr.  ****...

    $35.95
  • Eshopps Bio Cup R Filter media basket Eshopps Bio Cup R Filter media basket

    Eshopps

    Eshopps Bio Cup R Filter media basket

    Eshopps Bio Cup R Filter media basket New to ESHOPPS Bio Cup R, (Rectangular) media cup is designed to be used in place of a standard 4”x7” filter sock. ESHOPPS Bio Cup R all acrylic construction & high flow water channels allow for any type of...

    $34.98
  • Maxspect Phosphree 500 ml. Maxspect Phosphree 500 ml. Maxspect Phosphree 500 ml. Maxspect Phosphree 500 ml.

    Maxspect Mazarra

    Maxspect Phosphree 500 ml.

    Maxspect Phosphree 500 ml. A polymer phosphate removal resin that is chemically stable and will not leak any metal ions into the water column like metal-based absorbents. Available in 250ml and 500ml sizes. Slow absorption phosphate removal resin that...

    $32.99
  • ROWAphos GFO Phosphate Removal Media, 500 ml.      ROWAphos GFO Phosphate Removal Media, 500 ml.

    RowaPhos

    ROWAphos GFO Phosphate Removal Media, 500 ml.

    ROWAphos Phosphate Removal Media, 500 ml. ROWA®phos is a completely new filter material for eliminating phosphate, which was developed by the Weil Industrieanlagen GmbH company in Osnabrück, Germany. Due to its unique chemistry, it...

    $32.95
  • Seachem PhosGuard 2 Liters. Seachem PhosGuard 2 Liters.

    Seachem

    Seachem PhosGuard 2 Liters.

    Seachem PhosGuard 2 Liters. PhosGuard is a high capacity and high efficiency filtration product for removing phosphates and silicates from marine or fresh water aquaria. Unlike competing products, PhosGuard is bead-shaped for optimum flow...

    $32.30
  • BlueLife Clear FX PRO 225ml

    BlueLife

    BlueLife Clear FX PRO 225ml

    BlueLife Clear FX PRO 225ml CLEAR FX PRO is the most advanced all-in-one filtration media available on the market. Our cutting edge technology is compatible with both fresh and saltwater aquariums of all sizes. The easy to use media is the most...

    $31.04
  • BlueLife Clear FX REEF 225ml

    BlueLife

    BlueLife Clear FX REEF 225ml

    BlueLife Clear FX REEF 225ml Clear Fx Reef is an advanced comprehensive filter media for Reef Aquariums which can be used to ensure the health, clarity, and stability of your reef aquarium. This specialized reef filtration media uses cutting edge...

    $31.04
  • CO2 Scrubber Skimmer Lid 4" (C2C-120) CO2 Scrubber Skimmer Lid 4" (C2C-120) CO2 Scrubber Skimmer Lid 4" (C2C-120) CO2 Scrubber Skimmer Lid 4" (C2C-120)

    Reef Octopus

    CO2 Scrubber Skimmer Lid 4" (C2C-120)

    CO2 Scrubber Skimmer Lid 4" (C2C-120) A Perfect Lid for a Perfect Fit This special lid is designed to precisely fit a range of Reef Octopus protein skimmers with the intent to use it in conjunction with a CO2 Scrubber (RO-C2T-90) to draw out the...

    $30.99
  • Seachem PhosNet 250 gr. Seachem PhosNet 250 gr.

    Seachem

    Seachem PhosNet 250 gr.

    Seachem PhosNet 250 gr. PhosNet™ is a granular ferric oxide (GFO) with high porosity, high surface area and high binding capacity. It will rapidly remove phosphates and silicates from both freshwater and saltwater and will not release them back into...

    $30.99
  • DrTim's Aquatics NP-Active Pearls 450ml DrTim's Aquatics NP-Active Pearls 450ml DrTim's Aquatics NP-Active Pearls 450ml DrTim's Aquatics NP-Active Pearls 450ml DrTim's Aquatics NP-Active Pearls 450ml

    Dr. Tim's Aquatics

    DrTim's Aquatics NP-Active Pearls 450ml

    DrTim's Aquatics NP-Active Pearls 450ml A novel, innovative way, using PURE biodegradable bio-polymers, to control nitrate and phosphate in your aquarium. Specially developed for aquariums Works in ALL aquariums Safe for ALL fish and corals PURE -...

    $30.95
  • Fluval Bio-FX Media 5L Fluval Bio-FX Media 5L Fluval Bio-FX Media 5L Fluval Bio-FX Media 5L Fluval Bio-FX Media 5L

    Fluval

    Fluval Bio-FX Media 5L

    Fluval Bio-FX Media 5L BIO-FX is a premium biological media designed for use with canister filters and sumps of all sizes, including Fluval’s flagship FX series. Featuring a deep pore structure with interconnected micro-tunnels, BIO-FX offers a vast...

    $39.99
    $29.99
  • PURA Filtration Pad, Large 15" x 30"

    Magnavore

    PURA Filtration Pad, Large 15" x 30"

    PURA Filtration Pad, Large 15" x 30"PÛRA Filtration Pads offer the same broad-spectrum filtration capabilities as PÛRA Complete in a simple to use filtration pad form. In addition to heavy-duty chemical filtration, PÛRA Filtration...

    $29.99
  • Seachem Purigen Filter Media, 500 ml. Seachem Purigen Filter Media, 500 ml.

    Seachem

    Seachem Purigen Filter Media, 500 ml.

    Seachem Purigen Filter Media, 500 ml.Purigen™ is a premium synthetic adsorbent that is unlike any other filtration product. It is not a mixture of ion exchangers or adsorbents, but a unique macro-porous synthetic polymer that removes soluble and...

    $29.99
  •  Probe Holder Fitting  Probe Holder Fitting

    Reef Octopus

    Probe Holder Fitting

    Probe Holder This black nylon compression fitting designed to hold standard pH and ORP probes. Threaded end is 1/2-14 NPT. Includes PVC dummy plug in case probe is unavailable during equipment use. Comonly used for calcium reactors and collection...

    $29.95
  • ATB Bio-Pellets 500 ml. ATB Bio-Pellets 500 ml.

    AquaCave

    ATB Bio-Pellets 500 ml.

    ATB Bio-Pellets 500 ml. The ATB’s Bio Pellets are composed of biologically degradable polymers that are best to use with a media reactor. The pellets will allow aerobic growth of bacteria which consequently will consume nitrate and...

    $29.95
  • Caribsea ARM COARSE Calcium Reactor Media 8 lbs. Caribsea ARM COARSE Calcium Reactor Media 8 lbs.

    CaribSea

    Caribsea ARM COARSE Calcium Reactor Media 8 lbs.

      Caribsea ARM COARSE Calcium Reactor Media 8 lbs. Calcium reactors have evolved into several types that require different media sizes. We now offer our original ARM fine for down-flow, slow up-flow, and fluidized bed type calcium reactors and...

    $29.95
  • Fritz Pro Carbon AG (Activated Granular) 793 gr. Fritz Pro Carbon AG (Activated Granular) 793 gr.

    Fritz

    Fritz Pro Carbon AG (Activated Granular) 793 gr.

    Fritz Pro Carbon AG (Activated Granular) 793 gr. Fritz Carbon AG is a high-quality, 4x8 mesh granular, activated carbon ideal for use in fresh or saltwater aquariums with all types of filters. Fritz Carbon AG removes dissolved organic compounds (DOC),...

    $29.95
  • Fritz Pro Carbon AP (Activated Pellet) 793 gr. Fritz Pro Carbon AP (Activated Pellet) 793 gr.

    Fritz

    Fritz Pro Carbon AP (Activated Pellet) 793 gr.

    Fritz Pro Carbon AP (Activated Pellet) 793 gr. Fritz Carbon AP is a high-quality, 4mm pelletized, activated carbon ideal for use in fresh or saltwater aquariums. Fritz Pro Carbon AP (Activated Pellet) 793 gr. Fritz Carbon AP is a high-quality, 4mm...

    $29.95
  • PURA Complete 32 fl. oz. Treats 200 gal. PURA Complete 32 fl. oz. Treats 200 gal.

    Magnavore

    PURA Complete 32 fl. oz. Treats 200 gal.

    PURA Complete 32 fl. oz. Treats 200 gal. PÛRA Complete is a blended media that provides the most complete aquarium pollutant control at low cost. Blended with 25% PhosLock for total phosphate and silicate control, virgin bituminous acid washed...

    $29.95
  • Seachem Matrix Carbon Filter Media, 1,000 ml. Seachem Matrix Carbon Filter Media, 1,000 ml.

    Seachem

    Seachem Matrix Carbon Filter Media, 1,000 ml.

    MatrixCarbon is a truly unique activated carbon. It is formed as a spherical bead for optimum hydrodynamics, and will not pack. It permits maximum water flow and contact with its high density of macroporous binding sites..Seachem Matrix Carbon Filter...

    $29.95
  • Sera Super Activated Carbon, 2.2 lb.

    Sera

    Sera Super Activated Carbon, 2.2 lb.

    Sera Super Activated Carbon, 2.2 lb.Quickly and reliably absorbs toxic substances and colorants from the aquarium water. The yellowish tint of the aquarium water disappears. The water becomes crystal clear. sera super carbon does not affect the pH value...

    $29.95
  • Your Choice Aquatics - Bio Plate Filter Media Your Choice Aquatics - Bio Plate Filter Media Your Choice Aquatics - Bio Plate Filter Media

    Your Choice Aquatic

    Your Choice Aquatics - Bio Plate Filter Media

    Your Choice Aquatics - Bio Plate Filter Media High-Performance Bio Filter Media   - Increased Beneficial Bacteria Colonies - Helped Reduced Phosphates and Nitrates - Large Surface Growing Bacteria, Approximately 10,500sqft Per Plate - Safe For...

    $29.95
  •  Precision Needle Valve with 1/2" Barb Fittings  Precision Needle Valve with 1/2" Barb Fittings

    AquaCave

    Precision Needle Valve with 1/2" Barb Fittings

     Precision Needle Valve with 1/2" Barb Fittings For quick, easy and accurate regulation of flow applications, look no further than our Precision Needle Valve. Featuring a Teflon® stem seal and Black Filled Polyester Knob, this is both a...

    $27.99
  • Precision Needle Valve with 1/4" Barb Fittings Precision Needle Valve with 1/4" Barb Fittings

    AquaCave

    Precision Needle Valve with 1/4" Barb Fittings

    Precision Needle Valve with 1/4" Barb Fittings For quick, easy and accurate regulation of flow applications, look no further than our Precision Needle Valve. Featuring a Teflon® stem seal and Black Filled Polyester Knob, this is both a versatile and...

    $27.99
  • Precision Needle Valve with 3/8" Barb Fittings Precision Needle Valve with 3/8" Barb Fittings

    AquaCave

    Precision Needle Valve with 3/8" Barb Fittings

    Precision Needle Valve with 3/8" Barb Fittings For quick, easy and accurate regulation of flow applications, look no further than our Precision Needle Valve. Featuring a Teflon® stem seal and Black Filled Polyester Knob, this is both a versatile and...

    $27.99
  • Seachem Matrix Bio Filtration Media, 2000 ml. Seachem Matrix Bio Filtration Media, 2000 ml.

    Seachem

    Seachem Matrix Bio Filtration Media, 2000 ml.

    Seachem Matrix Bio Filtration Media, 2000 ml. Matrix is a high porosity biomedia that provides efficient biofiltration for the removal of nitrogenous waste. Matrix media is a porous inorganic solid with an average particle size of about 10 mm in...

    $25.99
  • Tropic Marin NP Bacto Balance 500 ml. Tropic Marin NP Bacto Balance 500 ml.

    Tropic Marin

    Tropic Marin NP Bacto Balance 500 ml.

    Tropic Marin NP Bacto Balance 500 ml. Mixture of selected organic compounds to promote the incorporation of nitrate and phosphate in supplementary biomass. The ratio of nutrients is ideal for corals, sponges and other invertebrate animals found in reef...

    $25.49
  •   PURA GFO Phos-Lock Filter Media, 1 lbs. (454 gr.)

    Magnavore

    PURA GFO Phos-Lock Filter Media, 1 lbs. (454 gr.)

    PhosLock is the benchmark German made ferric hydroxide media for total phosphate removal in all aquaria. Used all over the world, it is the product of choice for many critical water purity applications.PURA Phos-Lock Filter Media, 454 gr.  ****...

    $24.95
  • Brightwell Aquatics Carbonit-P, 500 gr. / 1.1 lb.

    Brightwell Aquatics

    Brightwell Aquatics Carbonit-P, 500 gr. / 1.1 lb.

    Premium quality activated carbon, offering desirablephysical and chemical characteristics for application in allmarine and freshwater aquaria.Brightwell Aquatics Carbonit-P, 500 gr. / 1.1 lb.* Premium quality activated carbon, offering desirable physical...

    $24.95
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