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At AquaCave, we offer some of the best selection & best prices on aquarium canister filters and reactors for you marine, reef, and freshwater aquarium.

  • AquaEl UltraMax 2000 Canister Filter AquaEl UltraMax 2000 Canister Filter AquaEl UltraMax 2000 Canister Filter AquaEl UltraMax 2000 Canister Filter

    AquaEl

    AquaEl UltraMax 2000 Canister Filter

    AquaEl UltraMax 2000 Canister Filter The AquaEl UltraMax 2000 Professional Canister Filter is a technologically advanced canister filter whose design is based on patented solutions that guarantee exceptional comfort of use, perfect water clarity, and...

    $249.99
  • JBJ Reaction Pro 2 RPC-175 Canister Filter JBJ Reaction Pro 2 RPC-175 Canister Filter JBJ Reaction Pro 2 RPC-175 Canister Filter

    JBJ

    JBJ Reaction Pro 2 RPC-175 Canister Filter

    JBJ Reaction Pro 2 RPC-175 Canister Filter External Canister Filters Reaction Pro 2 Canister Filters are versatile external filters perfect for freshwater or saltwater aquariums.   The high-capacity canister filter enhances traditional filtration...

    $245.00
  • Oase FiltoSmart Thermo 300 External Filter Oase FiltoSmart Thermo 300 External Filter Oase FiltoSmart Thermo 300 External Filter Oase FiltoSmart Thermo 300 External Filter Oase FiltoSmart Thermo 300 External Filter

    OASE

    Oase FiltoSmart Thermo 300 External Filter

    Oase FiltoSmart Thermo 300 External 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 Compact filter with large filter surface –...

    $238.99
  •  Sicce Whale 500 Black Canister Filter  Sicce Whale 500 Black Canister Filter  Sicce Whale 500 Black Canister Filter  Sicce Whale 500 Black Canister Filter  Sicce Whale 500 Black Canister Filter

    Sicce

    Sicce Whale 500 Black Canister Filter

    Sicce Whale 500 Black Canister Filter 80-135 Gal. 390 GPH • NEW! Unique and practical concept of self priming system• Ready to use and easy to set-up: complete with accessories and high performance filter media• 3 year warranty• For...

    $229.99
  • Fluval 407 Performance Canister Filter Fluval 407 Performance Canister Filter Fluval 407 Performance Canister Filter Fluval 407 Performance Canister Filter

    Fluval

    Fluval 407 Performance Canister Filter

    Fluval 407 Performance Canister Filter, up to 100 US Gal (500 L) 07 series marks the 7th incarnation in 4 decades of Fluval’s top selling canister filter family worldwide. Not only does the latest generation incorporate the power and reliability...

    $229.99
  • AquaEl UltraMax 1500 Canister Filter AquaEl UltraMax 1500 Canister Filter AquaEl UltraMax 1500 Canister Filter AquaEl UltraMax 1500 Canister Filter

    AquaEl

    AquaEl UltraMax 1500 Canister Filter

    AquaEl UltraMax 1500 Canister Filter The AquaEl UltraMax 1500 Professional Canister Filter is a technologically advanced canister filter whose design is based on patented solutions that guarantee exceptional comfort of use, perfect water clarity, and...

    $224.99
  • Eheim 2215 Classic 350 Canister Filter w/Media

    Eheim

    Eheim 2215 Classic 350 Canister Filter w/Media

    Eheim 2215 Classic External Canister Filter w/Media. The Classic family of canister filters feature carefully tailored external canisters and are equipped with high quality components . Classic filters provide low cost reliable high filtration. You...

    Was: $219.99
    Now: $209.99
  • JBJ Reaction Pro 2 RPC-100 Canister Filter JBJ Reaction Pro 2 RPC-100 Canister Filter JBJ Reaction Pro 2 RPC-100 Canister Filter

    JBJ

    JBJ Reaction Pro 2 RPC-100 Canister Filter

    JBJ Reaction Pro 2 RPC-100 Canister Filter External Canister Filters Reaction Pro 2 Canister Filters are versatile external filters perfect for freshwater or saltwater aquariums.   The high-capacity canister filter enhances traditional filtration...

    $194.00
  • AquaEl UltraMax 1000 Canister Filter AquaEl UltraMax 1000 Canister Filter AquaEl UltraMax 1000 Canister Filter AquaEl UltraMax 1000 Canister Filter

    AquaEl

    AquaEl UltraMax 1000 Canister Filter

    AquaEl UltraMax 1000 Canister Filter The AquaEl UltraMax 1000 Professional Canister Filter is a technologically advanced canister filter whose design is based on patented solutions that guarantee exceptional comfort of use, perfect water clarity, and...

    $189.99
  • Fluval 307 Performance Canister Filter Fluval 307 Performance Canister Filter Fluval 307 Performance Canister Filter Fluval 307 Performance Canister Filter Fluval 307 Performance Canister Filter

    Fluval

    Fluval 307 Performance Canister Filter

    Fluval 307 Performance Canister Filter, up to 70 US Gal (330 L) 07 series marks the 7th incarnation in 4 decades of Fluval’s top selling canister filter family worldwide. Not only does the latest generation incorporate the power and reliability...

    $189.99
  • Sicce Space EKO 300 Canister Filter Sicce Space EKO 300 Canister Filter Sicce Space EKO 300 Canister Filter Sicce Space EKO 300 Canister Filter

    Sicce

    Sicce Space EKO 300 Canister Filter

    Sicce Space EKO 300 Canister Filter - 240gph SPACE EKO are canister filters ideal for freshwater aquariums. A unique easy start up system, large filter capacity and silent operation make this range a very good choice for beginners. SPACE EKO canister...

    $189.99
  • Oase FiltoSmart Thermo 200 External Filter Oase FiltoSmart Thermo 200 External Filter Oase FiltoSmart Thermo 200 External Filter Oase FiltoSmart Thermo 200 External Filter Oase FiltoSmart Thermo 200 External Filter

    OASE

    Oase FiltoSmart Thermo 200 External Filter

    Oase FiltoSmart Thermo 200 External 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 Compact filter with large filter surface –...

    $182.99
  • Replacement Cartridge for Sedna Filter S1000-200-AQ Replacement Cartridge for Sedna Filter S1000-200-AQ

    Pentair Aquatics

    Replacement Cartridge for Sedna Filter S1000-200-AQ

    Replacement Cartridge for Sedna Filter S1000-200-AQ These 20 micron pleated cartridges are available in five sizes to fit the five sizes of Sedna Filters. Choose the right size filter cartridge to match your Sedna Filter. S1000-50C-AQ:...

    $167.92
  • Fluval 207 Performance Canister Filter Fluval 207 Performance Canister Filter Fluval 207 Performance Canister Filter Fluval 207 Performance Canister Filter Fluval 207 Performance Canister Filter

    Fluval

    Fluval 207 Performance Canister Filter

    Fluval 207 Performance Canister Filter, up to 45 US Gal (220 L) 07 series marks the 7th incarnation in 4 decades of Fluval’s top selling canister filter family worldwide. Not only does the latest generation incorporate the power and reliability...

    $152.99
  • Eheim 2213 Classic 250 Canister Filter w/Media

    Eheim

    Eheim 2213 Classic 250 Canister Filter w/Media

    Eheim 2213 Classic External Canister Filter w/Media. The Classic family of canister filters feature carefully tailored external canisters and are equipped with high quality components . Classic filters provide low cost reliable high filtration. You...

    Was: $159.99
    Now: $149.99
  • Sicce Space EKO 200 Canister Filter Sicce Space EKO 200 Canister Filter Sicce Space EKO 200 Canister Filter Sicce Space EKO 200 Canister Filter Sicce Space EKO 200 Canister Filter

    Sicce

    Sicce Space EKO 200 Canister Filter

    Sicce Space EKO 200 Canister Filter - 190gph SPACE EKO are canister filters ideal for freshwater aquariums. A unique easy start up system, large filter capacity and silent operation make this range a very good choice for beginners. SPACE EKO canister...

    $149.99
  • Nu-Clear 500 Series Filter Extension (EMPTY) Nu-Clear 500 Series Filter Extension (EMPTY)

    Nu-Clear

    Nu-Clear 500 Series Filter Extension (EMPTY)

    Nu-Clear 500 Series Filter Extension (EMPTY) The Nu-Clear Model 1506 Extension Kit doubles the height of the Inland Seas Nu-Clear Canister Filter Model 506, Empty Filter. The extension kit include the body extensions, stainless steel band clamp and...

    $149.95
  • Sicce Space EKO 100 Canister Filter Sicce Space EKO 100 Canister Filter Sicce Space EKO 100 Canister Filter Sicce Space EKO 100 Canister Filter Sicce Space EKO 100 Canister Filter

    Sicce

    Sicce Space EKO 100 Canister Filter

    Sicce Space EKO 100 Canister Filter - 145gph SPACE EKO are canister filters ideal for freshwater aquariums. A unique easy start up system, large filter capacity and silent operation make this range a very good choice for beginners. SPACE EKO canister...

    $139.99
  • Sicce Whale 200 Black Canister Filter Sicce Whale 200 Black Canister Filter Sicce Whale 200 Black Canister Filter Sicce Whale 200 Black Canister Filter Sicce Whale 200 Black Canister Filter

    Sicce

    Sicce Whale 200 Black Canister Filter

     Sicce Whale 200 Black Canister Filter 25-50 Gal 190 GPH • NEW! Unique and practical concept of self priming system• Ready to use and easy to set-up: complete with accessories and high performance filter media• 3 year warranty•...

    $139.99
  • Oase FiltoSmart Thermo 100 External Filter Oase FiltoSmart Thermo 100 External Filter Oase FiltoSmart Thermo 100 External Filter Oase FiltoSmart Thermo 100 External Filter Oase FiltoSmart Thermo 100 External Filter

    OASE

    Oase FiltoSmart Thermo 100 External Filter

    Oase FiltoSmart Thermo 100 External 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 Compact filter with large filter surface –...

    $138.99
  • Fluval 107 Performance Canister Filter Fluval 107 Performance Canister Filter Fluval 107 Performance Canister Filter Fluval 107 Performance Canister Filter Fluval 107 Performance Canister Filter

    Fluval

    Fluval 107 Performance Canister Filter

    Fluval 107 Performance Canister Filter, up to 30 US Gal (130 L) 07 series marks the 7th incarnation in 4 decades of Fluval’s top selling canister filter family worldwide. Not only does the latest generation incorporate the power and reliability...

    $134.99
  • Replacement Cartridge for Sedna Filter S1000-150-AQ Replacement Cartridge for Sedna Filter S1000-150-AQ

    Pentair Aquatics

    Replacement Cartridge for Sedna Filter S1000-150-AQ

    Replacement Cartridge for Sedna Filter S1000-150-AQ These 20 micron pleated cartridges are available in five sizes to fit the five sizes of Sedna Filters. Choose the right size filter cartridge to match your Sedna Filter. S1000-50C-AQ:...

    $134.63
  • Eheim 2211 Classic 150 Canister Filter w/Media

    Eheim

    Eheim 2211 Classic 150 Canister Filter w/Media

    Eheim 2211 Classic External Canister Filter w/Media The Classic family of canister filters feature carefully tailored external canisters and are equipped with high quality components . Classic filters provide low cost reliable high filtration. You...

    Was: $139.99
    Now: $129.99
  • Fluval FX UVC 6W Clarifier Fluval FX UVC 6W Clarifier Fluval FX UVC 6W Clarifier

    Fluval FX UVC 6W Clarifier

    Fluval FX UVC 6W Clarifier  The FX UVC In-Line Clarifier quickly and easily connects to all canister filters to eliminate suspended algae for a clear and clear aquarium. With unique CCFL technology, the FX UVC bulb runs cooler to last up to 2X...

    Was: $159.99
    Now: $124.99
  • Replacement Cartridge for Sedna Filter S1000-100-AQ Replacement Cartridge for Sedna Filter S1000-100-AQ

    Pentair Aquatics

    Replacement Cartridge for Sedna Filter S1000-100-AQ

    Replacement Cartridge for Sedna Filter S1000-100-AQ These 20 micron pleated cartridges are available in five sizes to fit the five sizes of Sedna Filters. Choose the right size filter cartridge to match your Sedna Filter. S1000-50C-AQ:...

    $102.06
  • Fluval UVC In-Line Clarifier Fluval UVC In-Line Clarifier Fluval UVC In-Line Clarifier Fluval UVC In-Line Clarifier Fluval UVC In-Line Clarifier

    Fluval

    Fluval 3 Watts UVC In-Line Clarifier

    Fluval UVC In-Line Clarifier Quickly and easily connected to most canister filter setups, the Fluval UVC In-Line Clarifier eliminates suspended bacteria and algae for a clean and clear aquarium. Fluval CCFL technology attacks cloudy and green water by...

    Was: $139.99
    Now: $99.99
  • Replacement Cartridge for Sedna Filter S1000-75-AQ Replacement Cartridge for Sedna Filter S1000-75-AQ

    Pentair Aquatics

    Replacement Cartridge for Sedna Filter S1000-75-AQ

    Replacement Cartridge for Sedna Filter S1000-75-AQ These 20 micron pleated cartridges are available in five sizes to fit the five sizes of Sedna Filters. Choose the right size filter cartridge to match your Sedna Filter. S1000-50C-AQ:...

    $83.23
  • Replacement Cartridge for Sedna Filter S1000-50-AQ Replacement Cartridge for Sedna Filter S1000-50-AQ

    Pentair Aquatics

    Replacement Cartridge for Sedna Filter S1000-50-AQ

    Replacement Cartridge for Sedna Filter S1000-50-AQ These 20 micron pleated cartridges are available in five sizes to fit the five sizes of Sedna Filters. Choose the right size filter cartridge to match your Sedna Filter. S1000-50C-AQ:...

    $64.27
  • Fluval FX Gravel Vacuum Fluval FX Gravel Vacuum Fluval FX Gravel Vacuum Fluval FX Gravel Vacuum Fluval FX Gravel Vacuum

    Fluval

    Fluval FX Gravel Vacuum

    Fluval FX Gravel Vacuum The FX Gravel Vac quickly connects to all Fluval FX canister filters for the ultimate convenience in powered substrate cleaning. Key Features : Effectively traps dirt and debris Integrated filter housing with Fine and Super...

    $59.99
  • Fluval X07 Glass Input/Output Lily Pipe Fluval X07 Glass Input/Output Lily Pipe Fluval X07 Glass Input/Output Lily Pipe

    Fluval

    Fluval X07 Glass Input/Output Lily Pipe

    Fluval X07 Glass Input/Output Lily Pipe The beautifully crafted Glass Lily Pipe Set comes equipped with a borosilicate glass filtration intake and output. The transparency of this material provides an unobstructed view of water flow, allowing you to...

    $49.99
  • 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
  • Fluval FX Spray Bar Kit Fluval FX Spray Bar Kit Fluval FX Spray Bar Kit Fluval FX Spray Bar Kit Fluval FX Spray Bar Kit

    Fluval

    Fluval FX Spray Bar Kit

    Fluval FX Spray Bar Kit DESCRIPTION The Fluval FX Spray Bar is used to direct water to any area of the aquarium. By doing so, increases surface agitation and improves oxygenation which is essential for a healthy aquarium. Features: Specifically...

    $39.99
  • Fluval SK400 Surface Skimmer Fluval SK400 Surface Skimmer Fluval SK400 Surface Skimmer Fluval SK400 Surface Skimmer Fluval SK400 Surface Skimmer

    Fluval

    Fluval SK400 Surface Skimmer

    Fluval SK400 Surface Skimmer The SK400 Surface Skimmer removes unwanted water surface film to help improve oxygenation and light penetration for a cleaner and healthier aquarium. Over time, surface films can develop from oils on your skin, household...

    $29.99
  • Eheim Prefilter for External Canister and Powerhead

    Eheim

    Eheim Prefilter for External Canister and Powerhead

    Eheim Prefilter for External Canister and Powerhead This extra prefilter traps the majority of coarse dirt particles, even before the water reaches the external filter. Its base rests securely on the bottom of the aquarium. The water is drawn in all...

    $19.99
  • Fluval Bio-FX Media 2L Fluval Bio-FX Media 2L Fluval Bio-FX Media 2L Fluval Bio-FX Media 2L Fluval Bio-FX Media 2L

    Fluval

    Fluval Bio-FX Media 2L

    Fluval Bio-FX Media 2L   Available in 2 packaging formats and 2 nugget sizes, BIO-FX is a premium biological media ideal for use with all filter types. Featuring a complex porous structure with deep interconnected micro-tunnels, BIO-FX provides vast...

    $19.99
  • Fluval Clear Hosing, 4 ft / 1.2 m Fluval Clear Hosing, 4 ft / 1.2 m Fluval Clear Hosing, 4 ft / 1.2 m

    Fluval

    Fluval Clear Hosing, 4 ft / 1.2 m

    Fluval Clear Hosing, 4 ft / 1.2 m Made of durable vinyl, the Clear Hosing set is compatible with any aquarium filtration equipment requiring an inner diameter of 16mm. Features 2-piece clear hosing set Each hose measures 4ft / 1.2m long 16 mm...

    $19.99
  • 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
  • Sicce MEGA FILTRA Replacement Hypercarbo Fast (2units) Sicce MEGA FILTRA Replacement Hypercarbo Fast (2units)

    Sicce

    Sicce MEGA FILTRA Replacement Hypercarbo Fast (2units)

    Sicce MEGA FILTRA Replacement Hypercarbo Fast (2units) Replacement Filter Media for Sicce Mega Filtra Canister Filters Keep your Mega Filtra canister filter running at peak performance with replacement media. Compatible with: Mega Filtra 650 Canister...

    $17.99
  • Eheim 2213 filter Sealing O-Ring Eheim 2213 filter Sealing O-Ring

    Eheim

    Eheim 2213 filter Sealing O-Ring

    Eheim 2213 filter Sealing O-Ring Main Rubber Seal Ring, prevents leaks by making a water tight seal in-between the main motor head, and the filter body. Check the condition of the main seal ring every time you do filter maintenance; pro-actively replace...

    $16.99
  • Eheim 2215 filter Sealing O-Ring Eheim 2215 filter Sealing O-Ring

    Eheim

    Eheim 2215 filter Sealing O-Ring

    Eheim 2215 filter Sealing O-Ring Prevents leaks by making a water tight seal in-between the main motor head and the filter body. Monitor the condition of the main seal ring every time you do filter maintenance and be sure to pro-actively replace it to...

    $16.99
  • Eheim 2217 filter Sealing O-Ring Eheim 2217 filter Sealing O-Ring

    Eheim

    Eheim 2217 filter Sealing O-Ring

    Eheim 2217 filter Sealing O-Ring Main Rubber Seal Ring, prevents leaks by making a water tight seal in-between the main motor head, and the filter body. Check the condition of the main seal ring every time you do filter maintenance; pro-actively replace...

    $16.99
  • 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