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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.

  • Two Little Fishes  ReBorn Calcium Reactor Media 8.8 lbs. Two Little Fishes  ReBorn Calcium Reactor Media 8.8 lbs.

    Two Little Fishies

    Two Little Fishes ReBorn Calcium Reactor Media 8.8 lbs.

    ReBorn Calcium Reactor Media 8.8 lbs. (4 KG), Two Little Fishies ReBorn is composed of the fossil sheletal remains of reef building corals sustainably harvest from prostone sites in the Western Pacific Ocean. When used in a calcium reactor where it is...

    $49.99
  • ATB Bio-Pellets 1000 ml. ATB Bio-Pellets 1000 ml.

    AquaCave

    ATB Bio-Pellets 1000 ml.

    ATB Bio-Pellets 1000 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...

    $49.95
  • ROWAphos GFO Phosphate Removal Media, 1,000 ml. ROWAphos GFO Phosphate Removal Media, 1,000 ml.

    RowaPhos

    ROWAphos GFO Phosphate Removal Media, 1,000 ml.

    ROWAphos Phosphate Removal Media, 1,000 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...

    $49.95
  • Chemi-Pure Boyd Elite 6.5oz Bulk 6 pack

    Boyd Enterprises

    Chemi-Pure Boyd Elite 6.5oz Bulk 6 pack

    Chemi-Pure Boyd Elite 6.5oz Bulk 6 pack Chemi-pure is still a very revolutionary product, and practically all aquarium filter mediums have been patterned after it! Over the years Boyd Enterprises has continually upgraded Chemi-pure with better...

    $48.37
  • 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...

    $47.34
  • BlueLife Clear FX PRO 450ml

    BlueLife

    BlueLife Clear FX PRO 450ml

    BlueLife Clear FX PRO 450ml 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...

    $45.50
  • BlueLife Clear FX REEF 450 ml

    BlueLife

    BlueLife Clear FX REEF 450 ml

    BlueLife Clear FX REEF 450 ml 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...

    $45.50
  • Poly Bio Marine Poly Filter Pad 12" x 12" Poly Bio Marine Poly Filter Pad 12" x 12"

    Poly Bio Marine Inc.

    Poly Bio Marine Poly Filter Pad 12" x 12"

    Poly Bio Marine Poly Filter Pad 12" x 12"The POLY-FILTER is for filtering and purifying both fresh and salt water aquariums. It is a formulation of a special patented material bonded to a synthetic matrix. By means of a unique proprietary process, the...

    $44.99
  • PolypLab Pro-Carbon 4000 ml. PolypLab Pro-Carbon 4000 ml.

    PolypLab

    PolypLab Pro-Carbon 4000 ml.

    PolypLab Pro-Carbon 4000 ml. (approx. 4 lbs.) High-performance activated carbon for crystal clear water in fresh-water and salt-water aquariums. PolypLab Pro Carbon is is an ultra high performance activated carbon manufactured under the most strict...

    $44.99
  • 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...

    $42.95
  • 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...

    $41.57
  • Boyd's Grande Chemi-Pure 40 Oz. Boyd's Grande Chemi-Pure 40 Oz. Boyd's Grande Chemi-Pure 40 Oz.

    Boyd Enterprises

    Boyd's Grande Chemi-Pure 40 Oz.

    Boyd's Grande Chemi-Pure 40 Oz. By combining premium pelletized carbon with specialized ion-exchange resins and placing these inside of a fine-mesh nylon media bag, Chemi-Pure delivers a convenient and effective way to rapidly remove organic compounds...

    $41.11
  • 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
  • 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
  • PolypLab Genesis Rock PolypLab Genesis Rock

    PolypLab

    PolypLab Genesis Rock

    PolypLab Genesis Rock Increase the overall filtration power of your tank by adding Genesis Rock to your system.  -Designed For Fresh or Saltwater Aquariums-23,000+ Additional Square Feet of Bacterial Space For Each Rock-2 Rocks Included in Set-Reduces...

    $39.99
  • Reef Endurance GFO 1.25lb Phosphate Adsorption Media Reef Endurance GFO 1.25lb Phosphate Adsorption Media Reef Endurance GFO 1.25lb Phosphate Adsorption Media

    Reef Endurance

    Reef Endurance GFO 1.25lbs Phosphate Adsorption Media

    Reef Endurance GFO 1.25lbs Phosphate Adsorption Media Phosphate Adsorption Media for Fresh and Marine Aquariums Granular Ferric Oxide, often referred to as GFO, is perfectly suited for filtering out phosphate from the water column. This helps promote...

    $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
  •  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
  • 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 -...

    $37.29
  • 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...

    $36.33
  • Reef Endurance Aquarium Carbon 1 Gallon Reef Endurance Aquarium Carbon 1 Gallon Reef Endurance Aquarium Carbon 1 Gallon Reef Endurance Aquarium Carbon 1 Gallon

    Reef Endurance

    Reef Endurance Aquarium Carbon 1 Gallon

    Reef Endurance Aquarium Carbon 1 Gallon Virgin Coal-based Granular Activated Carbon Derived from virgin coal this is a large Granular Activated Carbon (GAC) with high surface area and low dust characteristics. Use to remove discoloration, odors and...

    $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
  • 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...

    $35.79
  • 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
  • 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...

    $34.14
  • 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
  • Reef Endurance ROX 0.8 Carbon 1/2 gallon Reef Endurance ROX 0.8 Carbon 1/2 gallon Reef Endurance ROX 0.8 Carbon 1/2 gallon

    Reef Endurance

    Reef Endurance ROX 0.8 Carbon 1/2 gallon

    Reef Endurance ROX 0.8 Carbon 1/2 gallon Our Premium Activated Carbon Reef Endurance now offers ROX 0.8 Pharmaceutical Grade Activated Carbon, the finest activated carbon available. These tiny dense extruded pellets produce superior absorption for...

    $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 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...

    $31.93
  • 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
  •  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...

    $29.99
  • 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...

    $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
  • Red Sea REEF SPEC Carbon 1,000 ml. (500 gr.) Red Sea REEF SPEC Carbon 1,000 ml. (500 gr.)

    Red Sea

    Red Sea REEF SPEC Carbon 1,000 ml. (500 gr.)

    Red Sea REEF SPEC Carbon 1,000 ml. (500 gr.) REEF-SPEC Carbon has all the proper technical and physical characteristics making it a perfect carbon for marine and reef aquariums. The carbon will absorb and rapidly remove organic pollutants through its...

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

    CaribSea

    Caribsea ARM EXTRA COARSE Calcium Reactor Media 8 lbs.

      Caribsea ARM EXTRA 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, andCaribsea ARM EXTRA COARSE Calcium...

    $29.95