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BioSpace Reactor 6-3 (6" x 27") Up to 300 Gallons - Bashsea
Bashsea$449.99Elevate your aquarium’s ecosystem with the Bashsea BioSpace Reactor, the most effective biological filter currently available on the market. Engineered for the serious hobbyist, this reactor utilizes... -
KR618 Kalkwasser Reactor GEN3 - RED - Geo's Reef
Geo's Reef$554.00*******THESE REACTORS ARE IN STOCK AND WILL SHIP SAME DAY NEXT DAY - NO NEED TO WAIT FOR THEM TO BE BUILT******* This is the latest model GEO Kalkwasser Reactor GEN3. We have made many changes over... -
Natural Marine Accents Fossilized Aragonite - Ocean (800 mL) - Pisces Aqua
Pisces Aqua$29.99Calcium carbonate derived from oolitic aragonite is biogenic (created by living organisms) and naturally re-occurring. Protect the reef by using this superior and sustainable substrate. Add the... -
4" Space Saving Media Reactor - Adaptive Reef
Adaptive Reef$179.99Boost Filtration & Save Space with Adaptive Reef Perfect for Both Small and Large Aquarium Systems Holds Two Different Media Types Separately in a Single Reactor Choose Between 4" and 5"... -
AR618 Algae Reactor 2024 - RED - Geo's Reef
Geo's Reef$599.00The NEW 2024 GEO Algae Reactor is designed to filter your aquarium water by removing phosphates, nitrates, Co2 and help raise your aquarium pH without the use of artificial media. This amazing... -
MiniMax Pro Sump Reactor Replacement Sponges (4 Pack)- Innovative Marine
Innovative Marine$10.00MiniMax Pro Sump Reactor Replacement Sponges Part Number: 730305 4 Pieces Per Order Fits: MiniMax Pro Sump Reactor -
BioChurn 120INT Biopellet Reactor - Reef Octopus
Reef Octopus$323.39Rated up to: 200Gallons Holds: 700ml | Dim: 9.8" x 5.7"| Body Diameter: Ф5" | Height: 14.6"Feed pump: Aquatrance AQ-1200 In-SumpChurn Motion Fluidizing Biopellet Reactor Reef Octopus BioChurn... -
Super Silent Extreme CR818 SSE - 8" Calcium Reactor "Saltwater Edition" - Geo's Reef
Geo's Reef$979.00*******THESE REACTORS ARE IN STOCK AND WILL SHIP SAME DAY NEXT DAY - NO NEED TO WAIT FOR THEM TO BE BUILT******* The Super Silent Extreme CR818 SSE will hold 24 pounds of large grain media and is... -
Set of 2 Quick Release Lever (Metric M6) Thumbscrew Replacement - Slide Loc
Slide Loc$9.99Our latest evolution is to take on the meek and humble thumbscrew... often a thorn for hobbyists... and replace it with what can only be described as a massive leap forward. The Patent Pending lever... -
KR818 Kalkwasser Reactor GEN3 - RED - Geo's Reef
Geo's Reef$754.00*******THESE REACTORS ARE IN STOCK AND WILL SHIP SAME DAY NEXT DAY - NO NEED TO WAIT FOR THEM TO BE BUILT******* This is the latest model GEO Kalkwasser Reactor GEN3. We have made many changes over... -
Classic CR818 GEN 3 - 8" Calcium Reactor "Saltwater Edition" w/ Pump - Geo's Reef
Geo's Reef$775.00*******THESE REACTORS ARE IN STOCK AND WILL SHIP SAME DAY NEXT DAY - NO NEED TO WAIT FOR THEM TO BE BUILT******* The Classic CR818 GEN 3 will hold 24 pounds of large grain media and is well suited... -
KR818 Kalkwasser Reactor GEN3 - "Saltwater Edition" - Geo's Reef
Geo's Reef$754.00*******THESE REACTORS ARE IN STOCK AND WILL SHIP SAME DAY NEXT DAY - NO NEED TO WAIT FOR THEM TO BE BUILT******* This is the latest model GEO Kalkwasser Reactor GEN3. We have made many changes over... -
5" Space Saving Media Reactor - Adaptive Reef
Adaptive Reef$234.99Boost Filtration & Save Space with Adaptive Reef Perfect for Both Small and Large Aquarium Systems Holds Two Different Media Types Separately in a Single Reactor Choose Between 4" and 5"... -
NR618 Nitrate Reducing Sulfur Reactor GEN 3 - RED - Geo's Reef
Geo's Reef$595.00The NR618 shown will hold roughly 15 pounds of sulfur media in the chamber and is well suited for heavy loaded aquariums up to 200 gallons. Nitrate Reducing Sulfur reactors are the most underrated... -
CR220 DC Calcium Reactor 9" W/Varios 6 Pump - Reef Octopus
Reef Octopus$1,027.94VarioS CR220 9 inch Calcium Reactor SKU: OCT-CALR220 Footprint: 16.5″ x 11″ | Body Diameter: 9″ | Height: 23″ -
NR818 Nitrate Reducing Sulfur Reactor GEN 3 - RED - Geo's Reef
Geo's Reef$775.00The NR818 shown below will hold roughly 20 pounds of sulfur media in the chamber and is well suited for heavy loaded aquariums up to 300-600 gallons. Nitrate Reducing Sulfur reactors are the most... -
NR618 Nitrate Reducing Sulfur Reactor GEN 3 "Saltwater Blue Edition" - Geo's Reef
Geo's Reef$595.00The NR618 shown will hold roughly 15 pounds of sulfur media in the chamber and is well suited for heavy loaded aquariums up to 200 gallons. Nitrate Reducing Sulfur reactors are the most underrated... -
RedFlex Bio Reactor (up to 125 Gallons) - Pro Clear Aquatic Systems
Pro Clear Aquatic Systems$142.99Our Bio Reactors are made with high quality acrylic and are offered in two sizes. The reactor works by pushing the water from the bottom and towards the top while moving through the dispersion plate... -
BioChurn 90INT Reactor with HOB Bracket - Reef Octopus
Reef Octopus$277.19Reef Octopus BioChurn Biopellet reactor series take a new approach of efficiently fluidizing the biopellet media without blasting the media itself with direct flow pressure. The unique motion these... -
CO2 Regulator Set 600 - Eheim
EHEIM$199.95EHEIM CO²Set600 without bottle Aquarium water usually contains too little carbon dioxide (CO2) as it has already been extracted from the tap water at the waterworks. In addition to light, nitrogen,... -
Classic CR818 GEN 3 - 8" Calcium Reactor RED w/Pump - Geo's Reef
Geo's Reef$775.00*******THESE REACTORS ARE IN STOCK AND WILL SHIP SAME DAY NEXT DAY - NO NEED TO WAIT FOR THEM TO BE BUILT******* The Classic CR818 GEN 3 will hold 24 pounds of large grain media and is well suited... -
KS250 Nilson Kalkwasser Reactor - Reef Octopus
Reef Octopus$785.39Rated for Aquariums up to 320 Gallons Footprint: 12.6" x 12.6" | Body Diameter: 10" | Height: 26"Requires control timer and feed pump Gently mixes your calcium hydroxide Reef Octopus Kalk Stirrer... -
NR818 Nitrate Reducing Sulfur Reactor GEN 3 "Saltwater Blue Edition" - Geo's Reef
Geo's Reef$775.00The NR818 shown below will hold roughly 20 pounds of sulfur media in the chamber and is well suited for heavy loaded aquariums up to 300-600 gallons. Nitrate Reducing Sulfur reactors are the most... -
6-18 Bio Mass Reactor - Bashsea
Bashsea$334.99The ultimate maintenance free biological filter. Dimensions: 12.25" x 7.25" 18" Base Dimensions: 7.25" x 12.25" Chamber Dimensions: 6" Water Input: 0.5" Air Input: 0.125" or 1/8" Drain"... -
Classic CR618 GEN 3 - 6" Calcium Reactor Red & Black - Geo's Reef
Geo's Reef$595.00*******THESE REACTORS ARE IN STOCK AND WILL SHIP SAME DAY NEXT DAY - NO NEED TO WAIT FOR THEM TO BE BUILT******* The Classic CR618 GEN 3 will hold 12 pounds of large grain media and is suitable for... -
RedFlex Bio Reactor (up to 90 Gallons) - Pro Clear Aquatic Systems
Pro Clear Aquatic Systems$114.99Our Bio Reactors are made with high quality acrylic and are offered in two sizes. The reactor works by pushing the water from the bottom and towards the top while moving through the dispersion plate... -
CR100 DC Calcium Reactor 4" - Reef Octopus
Reef Octopus$438.89Rated for Aquariums up to 150 Gallons Footprint: 9.5" x 7.5" | Body Diameter: 4" | Height: 20"Recirculation Pump: Aquatrance 1200 Quality, design and affordability define the Octopus Calcium... -
AR836 Algae Reactor 2026 (Commercial) - Geo's Reef
Geo's Reef$1,849.00The NEW 2026 GEO AR836 Algae Reactor Commercial is designed to filter your aquarium water by removing phosphates, nitrates, Co2 and help raise your aquarium pH without the use of artificial media... -
BioChurn 90EXT HOB Reactor - Reef Octopus
Reef Octopus$381.14Rated up to: 100Gallons Holds: 400ml | Dim: 8.7" x 4.53"| Body Diameter: Ф4" | Height: 16.15"Feed pump: Aquatrance AQ-800 Hang On Back External Churn Motion Fluidizing Biopellet Reactor Reef...