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At AquaCave, we offer some of the best selection & best prices on Internal and sponge aquarium filters for your marine, reef, and freshwater aquarium.

55 of 55 Items
  • Sicce Shark Intertnal SKIM 300 Sicce Shark Intertnal SKIM 300 Sicce Shark Intertnal SKIM 300 Sicce Shark Intertnal SKIM 300 Sicce Shark Intertnal SKIM 300

    Sicce

    Sicce Shark Intertnal SKIM 300

    Sicce Shark Intertnal SKIM 300 Shark SKIMMER 150 and Shark SKIMMER 300 are modern internal skimmers with a very compact and innovative Shark design for direct integration into marine biotopes. They come from the latest development and knowledge in the...

    $139.99
  • Sicce Shark Intertnal SKIM 150 Sicce Shark Intertnal SKIM 150 Sicce Shark Intertnal SKIM 150 Sicce Shark Intertnal SKIM 150 Sicce Shark Intertnal SKIM 150

    Sicce

    Sicce Shark Intertnal SKIM 150

    Sicce Shark Intertnal SKIM 150 Shark SKIMMER 150 and Shark SKIMMER 300 are modern internal skimmers with a very compact and innovative Shark design for direct integration into marine biotopes. They come from the latest development and knowledge in the...

    $119.99
  • Oase BioPlus Thermo 200 Internal Filter Oase BioPlus Thermo 200 Internal Filter Oase BioPlus Thermo 200 Internal Filter Oase BioPlus Thermo 200 Internal Filter Oase BioPlus Thermo 200 Internal Filter

    OASE

    Oase BioPlus Thermo 200 Internal Filter

    Oase BioPlus Thermo 200 Internal Filter Integrated heater – Provides precise and uniform temperature levels and reduces the amount of equipment seen inside the aquarium by housing the heater in the unit Integrated diffuser with three adjustable water...

    $103.99
  • Oase BioPlus Thermo 100 Internal Filter Oase BioPlus Thermo 100 Internal Filter Oase BioPlus Thermo 100 Internal Filter Oase BioPlus Thermo 100 Internal Filter Oase BioPlus Thermo 100 Internal Filter

    OASE

    Oase BioPlus Thermo 100 Internal Filter

    Oase BioPlus Thermo 100 Internal Filter Integrated heater – Provides precise and uniform temperature levels and reduces the amount of equipment seen inside the aquarium by housing the heater in the unit Integrated diffuser with three adjustable water...

    $93.99
  • Hagen Fluval U4 Underwater Filter Hagen Fluval U4 Underwater Filter

    Fluval

    Hagen Fluval U4 Underwater Filter

    Hagen Fluval U4 Underwater Filter The Fluval “U” Internal Filters are ideal for use as a permanent filter system, for supplemental filtration, or as a "quick-filter" to polish water. The U1 offers single stage filtration, while the U2/U3/U4...

    Was: $109.99
    Now: $87.99
  • Oase BioPlus Thermo 50 Internal Filter Oase BioPlus Thermo 50 Internal Filter Oase BioPlus Thermo 50 Internal Filter Oase BioPlus Thermo 50 Internal Filter Oase BioPlus Thermo 50 Internal Filter

    OASE

    Oase BioPlus Thermo 50 Internal Filter

    Oase BioPlus Thermo 50 Internal Filter Integrated heater – Provides precise and uniform temperature levels and reduces the amount of equipment seen inside the aquarium by housing the heater in the unit Integrated diffuser with three adjustable water...

    $84.99
  • Oase BioPlus 200 Internal Filter Oase BioPlus 200 Internal Filter Oase BioPlus 200 Internal Filter Oase BioPlus 200 Internal Filter Oase BioPlus 200 Internal Filter

    OASE

    Oase BioPlus 200 Internal Filter

    Oase BioPlus 200 Internal Filter Integrated diffuser with three adjustable water flow settings – Allows for uniform surface movement, prevents formation of biofilm, and provides added aeration Simple cleaning and maintenance – Remove individual...

    $80.99
  • Sicce SHARK PRO 900 Internal Filter - 238 gph Sicce SHARK PRO 900 Internal Filter - 238 gph Sicce SHARK PRO 900 Internal Filter - 238 gph

    Sicce

    Sicce SHARK PRO 900 Internal Filter - 238 gph

    Sicce SHARK PRO 900 Internal Filter - 238 gph Shark PRO NEW range of internal filters with a very effective and high filtration volume which guarantee a crystal clear water in your tank. The SHARK PRO filters comes with a modular and flexible design...

    $79.99
  • Oase BioPlus 100 Internal Filter Oase BioPlus 100 Internal Filter Oase BioPlus 100 Internal Filter Oase BioPlus 100 Internal Filter Oase BioPlus 100 Internal Filter

    OASE

    Oase BioPlus 100 Internal Filter

    Oase BioPlus 100 Internal Filter Integrated diffuser with three adjustable water flow settings – Allows for uniform surface movement, prevents formation of biofilm, and provides added aeration Simple cleaning and maintenance – Remove individual...

    $71.99
  • Sicce SHARK PRO 700 Internal Filter - 185 gph Sicce SHARK PRO 700 Internal Filter - 185 gph Sicce SHARK PRO 700 Internal Filter - 185 gph

    Sicce

    Sicce SHARK PRO 700 Internal Filter - 185 gph

    Sicce SHARK PRO 700 Internal Filter - 185 gph Shark PRO NEW range of internal filters with a very effective and high filtration volume which guarantee a crystal clear water in your tank. The SHARK PRO filters comes with a modular and flexible design...

    $69.99
  • Oase BioPlus 50 Internal Filter Oase BioPlus 50 Internal Filter Oase BioPlus 50 Internal Filter Oase BioPlus 50 Internal Filter Oase BioPlus 50 Internal Filter

    OASE

    Oase BioPlus 50 Internal Filter

    Oase BioPlus 50 Internal Filter   Integrated diffuser with three adjustable water flow settings – Allows for uniform surface movement, prevents formation of biofilm, and provides added aeration Simple cleaning and maintenance – Remove individual...

    $63.99
  • Hagen Fluval U3 Underwater Filter Hagen Fluval U3 Underwater Filter

    Fluval

    Hagen Fluval U3 Underwater Filter

    Hagen Fluval U3 Underwater Filter The Fluval “U” Internal Filters are ideal for use as a permanent filter system, for supplemental filtration, or as a "quick-filter" to polish water. The U1 offers single stage filtration, while the U2/U3/U4...

    Was: $76.99
    Now: $61.59
  •  Sicce Shark ADV 800 Internal Filter  Sicce Shark ADV 800 Internal Filter  Sicce Shark ADV 800 Internal Filter  Sicce Shark ADV 800 Internal Filter

    Sicce

    Sicce Shark ADV 800 Internal Filter

    Sicce Shark ADV 800 Internal Filter, 211 gph, 10 watts Exclusive in design, Shark ADV is one of the best internal filters for aquariums. Shark ADV comes in three versions with different powers: from 400 to 800 l/h, for 60-200 L aquariums. Shark ADV...

    $59.99
  • Sicce SHARK PRO 500 Internal Filter - 132 gph Sicce SHARK PRO 500 Internal Filter - 132 gph Sicce SHARK PRO 500 Internal Filter - 132 gph Sicce SHARK PRO 500 Internal Filter - 132 gph Sicce SHARK PRO 500 Internal Filter - 132 gph

    Sicce

    Sicce SHARK PRO 500 Internal Filter - 132 gph

    Sicce SHARK PRO 500 Internal Filter - 132 gph Shark PRO NEW range of internal filters with a very effective and high filtration volume which guarantee a crystal clear water in your tank. The SHARK PRO filters comes with a modular and flexible design...

    $59.99
  • Aquatop Internal Filter w/ UV 7W Aquatop Internal Filter w/ UV 7W Aquatop Internal Filter w/ UV 7W

    AQUATOP

    Aquatop Internal Filter w/ UV 7W

    Aquatop Internal Filter w/ UV 7W AQUATOP's IF-UV Series of Internal Filters with UV are easy to install and maintain. These innovative and flexible filters help to eliminate unsightly algae and control unwanted algae blooms with the integrated UV system...

    $53.99
  • Sicce Shark ADV 600 Internal Filter Sicce Shark ADV 600 Internal Filter Sicce Shark ADV 600 Internal Filter Sicce Shark ADV 600 Internal Filter

    Sicce

    Sicce Shark ADV 600 Internal Filter

    Sicce Shark ADV 600 Internal Filter, 136 gph, 8 watts Exclusive in design, Shark ADV is one of the best internal filters for aquariums. Shark ADV comes in three versions with different powers: from 400 to 800 l/h, for 60-200 L aquariums. Shark ADV...

    $49.99
  • Hagen Fluval U2 Underwater Filter Hagen Fluval U2 Underwater Filter

    Fluval

    Hagen Fluval U2 Underwater Filter

    Hagen Fluval U2 Underwater Filter The Fluval “U” Internal Filters are ideal for use as a permanent filter system, for supplemental filtration, or as a "quick-filter" to polish water. The U1 offers single stage filtration, while the U2/U3/U4...

    Was: $60.99
    Now: $48.79
  • Sicce Shark MINI Surface SKIM 350 Plus Sicce Shark MINI Surface SKIM 350 Plus Sicce Shark MINI Surface SKIM 350 Plus Sicce Shark MINI Surface SKIM 350 Plus Sicce Shark MINI Surface SKIM 350 Plus

    Sicce

    Sicce Shark MINI Surface SKIM 350 Plus

    Sicce Shark MINI Surface SKIM 350 Plus Shark MINI SKIM effectively filters surface water, quickly and accurately freeing it from floating objects such as plant debris, dust and those annoying molds that can cause a reduction in the necessary air exchange...

    $44.99
  • Sicce Shark ADV 400 Internal Filter Sicce Shark ADV 400 Internal Filter Sicce Shark ADV 400 Internal Filter Sicce Shark ADV 400 Internal Filter

    Sicce

    Sicce Shark ADV 400 Internal Filter

    Sicce Shark ADV 400 Internal Filter 106gph The SHARK ADV is an exclusively designed internal filter with a patented magnetic quick uncoupling system (MCS System). The modular design allows the possibility of adding one or more filtering compartments to...

    $39.99
  • Sicce Shark PRO NANO 320 Sicce Shark PRO NANO 320 Sicce Shark PRO NANO 320 Sicce Shark PRO NANO 320 Sicce Shark PRO NANO 320

    Sicce

    Sicce Shark PRO NANO 320

    Sicce Shark PRO NANO 320 Having adequate filters for a small size aquarium is crucial to keep the livestock healthy. With the new SHARK PRO NANO we are offering the best compact option with EXTRA flow and MAX filtration capacity for small aquariums. Two...

    $39.99
  • Sicce Shark MINI Surface SKIM 350 Sicce Shark MINI Surface SKIM 350 Sicce Shark MINI Surface SKIM 350 Sicce Shark MINI Surface SKIM 350 Sicce Shark MINI Surface SKIM 350

    Sicce

    Sicce Shark MINI Surface SKIM 350

    Sicce Shark MINI Surface SKIM 350 Shark MINI SKIM effectively filters surface water, quickly and accurately freeing it from floating objects such as plant debris, dust and those annoying molds that can cause a reduction in the necessary air exchange...

    $34.99
  • Sicce Shark PRO NANO 250 Sicce Shark PRO NANO 250 Sicce Shark PRO NANO 250 Sicce Shark PRO NANO 250 Sicce Shark PRO NANO 250

    Sicce

    Sicce Shark PRO NANO 250

    Sicce Shark PRO NANO 250 Having adequate filters for a small size aquarium is crucial to keep the livestock healthy. With the new SHARK PRO NANO we are offering the best compact option with EXTRA flow and MAX filtration capacity for small aquariums. Two...

    $29.99
  • Sicce Shark ADV ADD-ON Cartridge with Sponge - 2x20ppi Sicce Shark ADV ADD-ON Cartridge with Sponge - 2x20ppi

    Sicce

    Sicce Shark ADV ADD-ON Cartridge with Sponge - 2x20ppi

    Sicce Shark ADV ADD-ON Cartridge with Sponge - 2x20ppi This is a refill cartridge for Shark ADV internal power filters. It is an expandable modular cartridge that can be used alongside a wide range of Sicce filtration media. Can be customized for Bio...

    $21.99
  • Hydro Sponge 5 PRO Aquarium Filter Hydro Sponge 5 PRO Aquarium Filter

    Aquarium Technology

    Hydro Sponge 5 PRO Aquarium Filter

    Hydro Sponge 5 PRO Aquarium Filter The Hydro-Sponge Pro is the newest product line among our family. The Hydro-Sponge Pro like the Hydro-Sponge is made in all the same sizes but unlike the Hydro-Sponge line it uses reticulated foam. This gives the...

    $17.95
  • Hydro Sponge 4 PRO Aquarium Filter Hydro Sponge 4 PRO Aquarium Filter

    Aquarium Technology

    Hydro Sponge 4 PRO Aquarium Filter

    Hydro Sponge 4 PRO Aquarium Filter The Hydro-Sponge Pro is the newest product line among our family. The Hydro-Sponge Pro like the Hydro-Sponge is made in all the same sizes but unlike the Hydro-Sponge line it uses reticulated foam. This gives the...

    $15.95
  • Hydro Sponge 3 PRO Aquarium Filter Hydro Sponge 3 PRO Aquarium Filter

    Aquarium Technology

    Hydro Sponge 3 PRO Aquarium Filter

    Hydro Sponge 3 PRO Aquarium Filter The Hydro-Sponge Pro is the newest product line among our family. The Hydro-Sponge Pro like the Hydro-Sponge is made in all the same sizes but unlike the Hydro-Sponge line it uses reticulated foam. This gives the...

    $13.95
  • Hydro Sponge 5 Aquarium Filter Hydro Sponge 5 Aquarium Filter

    Aquarium Technology

    Hydro Sponge 5 Aquarium Filter

    Hydro Sponge 5 Aquarium Filter The Hydro Sponge filters provides both mechanical and biological filtration. Aerobic bacteria colonize the sponge, providing a bacterial substrate to facilitate the nitrogen cycle. In addition, the Hydro-Sponge traps...

    $13.95
  • Sponge Filter, Dual Sponge Filter, Dual Sponge Filter, Dual Sponge Filter, Dual

    AquaCave

    Sponge Filter, Dual

    Sponge Filter, Dual Super Biochemical Spoge Filter Size: Each Sponge Disc W 2" 1/4"  H 3/4" Size: Unit W 6" 1/2" W 9" 1/2"    

    $12.99
  • Hydro Sponge 2 PRO Aquarium Filter Hydro Sponge 2 PRO Aquarium Filter

    Aquarium Technology

    Hydro Sponge 2 PRO Aquarium Filter

    Hydro Sponge 2 PRO Aquarium Filter The Hydro-Sponge Pro is the newest product line among our family. The Hydro-Sponge Pro like the Hydro-Sponge is made in all the same sizes but unlike the Hydro-Sponge line it uses reticulated foam. This gives the...

    $12.95
  • Hydro Sponge 4 Aquarium Filter Hydro Sponge 4 Aquarium Filter

    Aquarium Technology

    Hydro Sponge 4 Aquarium Filter

    Hydro Sponge 4 Aquarium Filter The Hydro Sponge filters provides both mechanical and biological filtration. Aerobic bacteria colonize the sponge, providing a bacterial substrate to facilitate the nitrogen cycle. In addition, the Hydro-Sponge traps...

    $12.95
  • Hydro Sponge 3 Aquarium Filter Hydro Sponge 3 Aquarium Filter

    Aquarium Technology

    Hydro Sponge 3 Aquarium Filter

    Hydro Sponge 3 Aquarium Filter The Hydro Sponge filters provides both mechanical and biological filtration. Aerobic bacteria colonize the sponge, providing a bacterial substrate to facilitate the nitrogen cycle. In addition, the Hydro-Sponge traps...

    $11.95
  • Corner Box Filter, Large Corner Box Filter, Large Corner Box Filter, Large Corner Box Filter, Large Corner Box Filter, Large

    AquaCave

    Corner Box Filter, Large

    Corner Box Filter, Large Dimensions: Width: 3.1" Height: 6" Multi-layer Fine Sponge: Provide mechanical and biological filtration and trap debris or wastes without sucking up your fish. Keep fish tanks crystal clear and healthy. Further Cleaning: The...

    $10.99
  • Sponge Filter, Large Sponge Filter, Large Sponge Filter, Large

    AquaCave

    Sponge Filter, Large

    Sponge Filter, Large Super Biochemical Spoge Filter Size: Each Sponge Disc W 4" 1/4"  H 1/2" Size: Unit W 6.5" W 8"    

    $10.99
  • Hydro Sponge 2 Aquarium Filter Hydro Sponge 2 Aquarium Filter

    Aquarium Technology

    Hydro Sponge 2 Aquarium Filter

    Hydro Sponge 2 Aquarium Filter The Hydro Sponge filters provides both mechanical and biological filtration. Aerobic bacteria colonize the sponge, providing a bacterial substrate to facilitate the nitrogen cycle. In addition, the Hydro-Sponge traps...

    $10.95
  • Sponge Filter, Medium Sponge Filter, Medium Sponge Filter, Medium

    AquaCave

    Sponge Filter, Medium

    Sponge Filter, Medium Super Biochemical Spoge Filter Size: Each Sponge Disc W 2" 1/4"  H 3/4" Size: Unit W 4" W 9" 1/2"    

    $9.99
  • Corner Box Filter, Medium Corner Box Filter, Medium Corner Box Filter, Medium Corner Box Filter, Medium Corner Box Filter, Medium

    AquaCave

    Corner Box Filter, Medium

    Corner Box Filter, Medium Dimensions: Width: 3.1" Height: 4" Multi-layer Fine Sponge: Provide mechanical and biological filtration and trap debris or wastes without sucking up your fish. Keep fish tanks crystal clear and healthy. Further Cleaning: The...

    $8.99
  • Hydro Sponge 1 Aquarium Filter Hydro Sponge 1 Aquarium Filter

    Aquarium Technology

    Hydro Sponge 1 Aquarium Filter

    Hydro Sponge 1 Aquarium Filter The Hydro Sponge filters provides both mechanical and biological filtration. Aerobic bacteria colonize the sponge, providing a bacterial substrate to facilitate the nitrogen cycle. In addition, the Hydro-Sponge traps...

    $8.95
55 of 55 Items