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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.

42 of 42 Items
  • 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 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