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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.

  • 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
  • Reef Endurance Aquarium Carbon 1/2 Gallon Reef Endurance Aquarium Carbon 1/2 Gallon Reef Endurance Aquarium Carbon 1/2 Gallon Reef Endurance Aquarium Carbon 1/2 Gallon

    Reef Endurance

    Reef Endurance Aquarium Carbon 1/2 Gallon

    Reef Endurance Aquarium Carbon 1/2 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...

    $28.99
  • 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...

    $28.03
  • 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
  •   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
  • Seachem PhosBond 500 gr. Seachem PhosBond 500 gr.

    Seachem

    Seachem PhosBond 500 gr.

    Seachem PhosBond 500 gr. 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...

    $24.49
  • Brightwell Aquatics Carbonit-X3,  225 gr. / 7.9 oz.

    Brightwell Aquatics

    Brightwell Aquatics Carbonit-X3, 225 gr. / 7.9 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...

    $23.95
  •    PhosBan GFO Media, 0.33 lbs. (150 gr.)     PhosBan GFO Media, 0.33 lbs. (150 gr.)

    Two Little Fishies

    PhosBan GFO Media, 0.33 lbs. (150 gr.)

    This granular ferric oxide hydroxide adsorbs phosphates from saltwater and freshwater. Also adsorbs silicates and dissolved organics...PhosBan Media by Two Little Fishes, 150 gr.This granular ferric oxide hydroxide adsorbs phosphates from saltwater and...

    $22.65
  • Fluval Aquatic Peat, 500 gr. Fluval Aquatic Peat, 500 gr. Fluval Aquatic Peat, 500 gr.

    Fluval

    Fluval Aquatic Peat, 500 gr.

    Fluval Aquatic Peat, 500 gr. Peat Granules provide an all-natural way to soften aquarium water and achieve the pH levels required for breeding and rearing certain tropical fish. Peat contains humic acid, tanning agents, and trace elements that are...

    $21.99
  • Reef Endurance ROX 0.8 Carbon 1/4 gallon Reef Endurance ROX 0.8 Carbon 1/4 gallon Reef Endurance ROX 0.8 Carbon 1/4 gallon

    Reef Endurance

    Reef Endurance ROX 0.8 Carbon 1/4 gallon

    Reef Endurance ROX 0.8 Carbon 1/4 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...

    $21.99
  • Brightwell Aquatics NeoMag, 1 kg. / 2.2 lbs.

    Brightwell Aquatics

    Brightwell Aquatics NeoMag, 1 kg. / 2.2 lbs.

    Brightwell Aquatics NeoMag, 1 kg. / 2.2 lbs. * High-purity, magnesium-rich mineral DOLOMITE that may be employed in traditional calcium reactors, or even blended in to pre-existing aquarium substratum, to gradually increase and maintain the magnesium...

    $21.95
  • ROWAphos GFO Phosphate Removal Media, 250 ml. ROWAphos GFO Phosphate Removal Media, 250 ml.

    RowaPhos

    ROWAphos GFO Phosphate Removal Media, 250 ml.

    ROWAphos Phosphate Removal Media, 250 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...

    $21.95
  • Seachem CupriSorb 250 ml. Seachem CupriSorb 250 ml.

    Seachem

    Seachem CupriSorb 250 ml.

    Seachem CupriSorb 250 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...

    $21.95
  •   Boyds Chemi-Pure Blue 11 oz      Boyds Chemi-Pure Blue 11 oz

    Boyd Enterprises

    Boyds Chemi-Pure Blue 11 oz

    Boyds Chemi-Pure Blue 11 oz.Chemi-pure Blue is specially created for fantastic results in reef and marine aquariums. Our NEW proprietary blend of premium, low-dust pelleted carbon and high capacity ion-exchange resins are skillfully combined to create a...

    $20.53
  • Seachem PhosGuard 1 Liter. Seachem PhosGuard 1 Liter.

    Seachem

    Seachem PhosGuard 1 Liter.

    Seachem PhosGuard 1 Liter. 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 characteristics...

    $20.50
  • Eshopps Bio Balls - 100 Count

    Eshopps

    Eshopps Bio Balls - 100 Count

    Eshopps Bio Balls - 100 Count Bio Balls are perfect homes for your beneficial bacteria. It has been used by aquarists for a very long time and many still does. As it has been proven to be very effective and when used properly creates the best growth for...

    $19.99
  • PolypLab Activated Carbon 1000 ml. PolypLab Activated Carbon 1000 ml.

    PolypLab

    PolypLab Activated Carbon 1000 ml.

    PolypLab Activated Carbon 1000 ml. 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 quality...

    $19.99
  • Red Sea REEF SPEC Carbon 500 ml. (250 gr.) Red Sea REEF SPEC Carbon 500 ml. (250 gr.)

    Red Sea

    Red Sea REEF SPEC Carbon 500 ml. (250 gr.)

    Red Sea REEF SPEC Carbon 500 ml. (250 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...

    $19.99
  • SERA Filter Wool Mechanical Filter Media, 17.6 oz

    Sera

    SERA Filter Wool Mechanical Filter Media, 17.6 oz

    SERA Filter Wool Mechanical Filter Media, 17.6 oz.Economical filter medium for fresh and salt water aquariums. sera filter wool is suitable for internal and external filters and can be washed out several times. It is very stable and retains...

    $19.99
  • Two Little Fishes NPX Adaptor for Reactor 550 Two Little Fishes NPX Adaptor for Reactor 550

    Two Little Fishies

    Two Little Fishes NPX Adaptor for Reactor 550

    Two Little Fishes NPX Adaptor for Reactor 550 The Two Little Fishies Phosban Reactor 550 NPX Adaptor is a vortex generator for fluidizing the NPX BioPlastic and other biopellets in the Two Little Fishies Reactor 550. This will keep the biopellets from...

    $19.99
  • PURA Complete 16 fl. oz. Treats 100 gal. PURA Complete 16 fl. oz. Treats 100 gal.

    Magnavore

    PURA Complete 16 fl. oz. Treats 100 gal.

    PURA Complete 16 fl. oz. Treats 100 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...

    $19.95
  • DrTim's Aquatics NP-Active Pearls 150ml DrTim's Aquatics NP-Active Pearls 150ml DrTim's Aquatics NP-Active Pearls 150ml DrTim's Aquatics NP-Active Pearls 150ml DrTim's Aquatics NP-Active Pearls 150ml

    Dr. Tim's Aquatics

    DrTim's Aquatics NP-Active Pearls 150ml

    DrTim's Aquatics NP-Active Pearls 150ml 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 -...

    $19.39
  • Seachem PhosNet 125 gr. Seachem PhosNet 125 gr.

    Seachem

    Seachem PhosNet 125 gr.

    Seachem PhosNet 125 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...

    $19.20
  • Fluval Activated Carbon, 100 gr., 3 Pack Fluval Activated Carbon, 100 gr., 3 Pack

    Fluval

    Fluval Activated Carbon, 100 gr., 3 Pack

    Fluval Activated Carbon, 100 gr., 3 Pack Chemical filter media Removes trace metals toxic to sensitive fish, organic contaminants, discolorations and odors Creates sparkling, crystal clear water Made of bituminous carbon – long lasting, highly...

    $18.95
  • Boyds Chemi-Pure Green 11 oz. Boyds Chemi-Pure Green 11 oz.

    Boyd Enterprises

    Boyds Chemi-Pure Green 11 oz.

    Boyds ChemiPure Green 11 oz. Activated carbon with ion-exchange resins This enhances plant growth and clarifies water Suitable for freshwater & planted aquariums Stabilises your pH and macronutrient levels Will not strip aquarium micro/macro...

    $18.48
  • Maxspect Phosphree 250 ml. Maxspect Phosphree 250 ml. Maxspect Phosphree 250 ml. Maxspect Phosphree 250 ml.

    Maxspect Mazarra

    Maxspect Phosphree 250 ml.

    Maxspect Phosphree 250 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...

    $17.99
  • Red Sea Reefer Filter Media Cup 4" Red Sea Reefer Filter Media Cup 4"

    Red Sea

    Red Sea Reefer Filter Media Cup 4"

    Red Sea Reefer Filter Media Cup 4" 4" filter media cups include a free high quality filter media bag, as used in Red Sea Reef-Spec Carbon. Cup Dimensions: 4.25 x 4.25 x 8.5" Red Sea Reefer Filter Media Cup 4" 4" filter media cups include a free...

    $17.95
  • Seachem Matrix Carbon Filter Media, 500 ml. Seachem Matrix Carbon Filter Media, 500 ml.

    Seachem

    Seachem Matrix Carbon Filter Media, 500 ml.

    Seachem Matrix Carbon Filter Media, 500 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...

    $17.95
  • Two Little Fishes HydroCarbon, 1 Liter

    Two Little Fishies

    Two Little Fishes HydroCarbon, 1 Liter

    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..Two Little Fishes HydroCarbon, 1...

    $17.85
  • Chemi-Pure ELITE 11.74 oz. by Boyd Enterprises

    Boyd Enterprises

    Chemi-Pure ELITE 11.74 oz. by Boyd Enterprises

    Chemi Pure ELITE 11.74 oz. by Boyd Enterprises. The Boyd Chemipure Elite has the filtration capability of the Boyd Chemipure but it's loaded with ferric oxide to help quickly get rid of phosphates and silicates. Boyd Chemipure Elite is an...

    $17.11
  • Sera Super-Activ Peat Granulate, 500gr.

    Sera

    Sera Super-Activ Peat Granulate, 500gr.

    Sera Super Activ black peat granulate stabilizes the pH value in the slightly acidic range and creates the correct water conditions for all ornamental fish from Southern America, Western Africa and Asia such as discus, characins, catfish, barbs and...

    $16.99
  • ESV Granular Activated Carbon, 15 oz. ESV Granular Activated Carbon, 15 oz.

    E.S.V.

    ESV Granular Activated Carbon, 15 oz.

    ESV Granular Activated Carbon, 15 oz.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,...

    $16.95
  • Fluval Biomax, 500 gr. by Hagen

    Fluval

    Fluval Biomax, 500 gr. by Hagen

    BioMax filter media are inert ceramic rings that are capable of supporting large populations of water purifying bacteria. Composed of a variety of channels and tunnels, the multitude of tiny pores can support these colonies of beneficial bacteria. BioMax...

    $16.95
  • Skimz PUR Carbon, 500 ml. Skimz PUR Carbon, 500 ml.

    Skimz

    Skimz PUR Carbon, 500 ml.

    Skimz PUR Carbon, 500 ml. Skimz PurCarbon is a high performance activated carbon with superior pore space, ideally suited to remove dissolved organic waste, foul odours, toxins and water discoloration (yellow tint) from the water leaving your aquarium...

    $16.95
  • Two Little Fishes NPX Adaptor for Reactor 150 Two Little Fishes NPX Adaptor for Reactor 150

    Two Little Fishies

    Two Little Fishes NPX Adaptor for Reactor 150

    Two Little Fishes NPX Adaptor for Reactor 150 The Two Little Fishies Phosban Reactor 150 NPX Adaptor is a vortex generator for fluidizing the NPX BioPlastic and other biopellets in the Two Little Fishies Reactor 150. This will keep the biopellets from...

    $15.99
  • AquaTech Premium Carbon, 1.5 lb./681 gr.

    Aqua-Tech Co.

    AquaTech Premium Carbon, 1.5 lb./681 gr.

    AquaTech Premium Carbon, 1.5 lb./681 gr.CRYSTAL CLEAR WATERAll carbon is not created equal. Clearly CARBON is bituminous (coal based), the most highly regarded form of carbon for the aquarium and water reclamation industries. Clearly CARBON exceeds...

    $15.95
  • IceCap Color Changing CO2 Absorbent Media 1kg. IceCap Color Changing CO2 Absorbent Media 1kg. IceCap Color Changing CO2 Absorbent Media 1kg. IceCap Color Changing CO2 Absorbent Media 1kg.

    IceCap

    IceCap Color Changing CO2 Absorbent Media 1kg.

    IceCap Color Changing CO2 Absorbent Media 2 kg. Struggling with low pH? Frustrated by slow coral growth? We've got the solution! Introducing the IceCap CO2 Scrubber and CO2 Absorbent Media It happens to all of us at some point during our reefing...

    $15.00
  • Bubble Magus 4" Media Cup Bubble Magus 4" Media Cup

    Bubble Magus

    Bubble Magus 4" Media Cup

    Bubble Magus 4" Media Cup Rigid acrylic filter cup made to fit a regular 4" sock holder, this version has additional vertical flow slots in the sides,  these slots in addition to the base venting create an effective open area of 99% across the diameter...

    $14.99
  • Fluval Zeo-Carb, 150 gr. 3 Pack Fluval Zeo-Carb, 150 gr. 3 Pack

    Fluval

    Fluval Zeo-Carb, 150 gr. 3 Pack

    Fluval Zeo-Carb, 150 gr. 3 Pack Features Chemical filter media Frees up space inside the filter to include additional media if desired Helps create clean and healthy water conditions Mesh bag included for use in sumps and large filters

    $14.99
  • Reef Endurance Aquarium Carbon 1/4 Gallon Reef Endurance Aquarium Carbon 1/4 Gallon Reef Endurance Aquarium Carbon 1/4 Gallon Reef Endurance Aquarium Carbon 1/4 Gallon

    Reef Endurance

    Reef Endurance Aquarium Carbon 1/4 Gallon

    Reef Endurance Aquarium Carbon 1/4 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...

    $14.99
  • BIO BALE ( White) 1 gal. - CPR Aquatics

    CPR

    BIO BALE ( White) 1 gal. - CPR Aquatics

    From the large Aquaculture industry to the home hobbyist, Bio-BaleTM is the filter medium of choice for professionals. Simple in concept, Bio-BaleTM owes its extreme effectiveness to its high surface area versus volume and its unique surface texture......

    $14.95