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Neptune SystemsProducts (194)
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Octo VarioS-4 Controllable DC Water Pump - Reef Octopus
Reef Octopus$404.24Efficiency: 24V / 40watts Dimensions: 3.75in(W) x 5.7in(L) x 5.5in(H)Controller Features: multiple pause times, float switch safety and 0-10v input for 3rd party controllerIncludes: VarioS-4... -
Titanium Sump 34 - Trigger Systems
Trigger Systems$1,059.99Trigger Systems is proud to introduce the Titanium line of sumps and ATOs. The Titanium line, as all of Trigger Systems products, are well thought out and may just be the last sump that you will ever... -
On Sale 15%
On Sale 15%Bulk Pharma Magnesium Chloride (35 Pounds) - Bulk Reef Supply
Bulk Reef Supply$189.99$161.49Bulk Magnesium Chloride - Ultra Pure Magnesium Additive for your Reef Tank! Keep your reef balanced - Use with BRS Pharma Magnesium Sulfate Maintaining proper magnesium levels helps achieve the... -
Regal 200 INT Protein Skimmer (200-400 Gallons) - Reef Octopus
Reef Octopus$866.24The new and innovative Reef Octopus Regal 200-INT in-sump protein skimmer supplies powerful filtration for aquariums up to 400 gallons where sump space is not limited. The Reef Octopus Regal 200-INT... -
Elite 150 SSS Space Saver Super Cone Skimmer - Reef Octopus
Reef Octopus$1,074.14The new and innovative Reef Octopus Elite 150-SSS in-sump protein skimmer supplies powerful filtration for aquariums up to 400 gallons where sumps space may be limited. The Reef Octopus Elite... -
Elite 220 SSS Space Saver Super Cone Skimmer - Reef Octopus
Reef Octopus$1,484.16The new and innovative Reef Octopus Elite 220-SSS in-sump protein skimmer supplies powerful filtration for aquariums up to 530 gallons where sumps space may be limited. The Reef Octopus Elite... -
On Sale 15%
On Sale 15%Pharma Magnesium Mix for General Adjustments - Bulk Reef Supply
Bulk Reef Supply$19.99$16.99Ultra Pure Magnesium Additive for General Adjustments in your Reef Tank! Maintaining proper magnesium levels helps achieve the essential balance of calcium and alkalinity in your tank by... -
Elite 150INT Super Cone Protein Skimmer - Reef Octopus
Reef Octopus$808.49Our Very Best In-Sump Skimmer for Aquariums up to 210 Gallons Footprint: 11.4" x 10.4" | Reaction Chamber: 6" Super Cone | Height: 20.6"Controllable Pump: Reef Octopus 24V VarioS-2S Ultimate in... -
On Sale 11%
On Sale 11%(OPEN BOX) Octo VarioS-4 Controllable DC Water Pump - Reef Octopus
Reef Octopus$404.24$359.99UNUSED CUSTOMER RETURN Efficiency: 24V / 40watts Dimensions: 3.75in(W) x 5.7in(L) x 5.5in(H)Controller Features: multiple pause times, float switch safety and 0-10v input for 3rd party... -
Elite 200 SSS Space Saver Super Cone Skimmer - Reef Octopus
Reef Octopus$1,305.14The new and innovative Reef Octopus Elite 200-SSS in-sump protein skimmer supplies powerful filtration for aquariums up to 400 gallons where sumps space may be limited. The Reef Octopus Elite... -
Regal 300 SSS Space Saving Skimmer (400-700 Gallons) - Reef Octopus
Reef Octopus$1,201.19The new and innovative Reef Octopus Regal 300-SSS in-sump protein skimmer supplies powerful filtration for aquariums up to 600 gallons where sump space may be limited. The Reef Octopus Regal 300-SSS... -
Regal 300 SSS Space Saving Skimmer (500-700 Gallons) - Reef Octopus
Reef Octopus$1,143.99Compact In-Sump Skimmer for Aquariums up to 700 Gallons Footprint: 15.2" x 13" | Reaction Chamber: 12" | Height: 25.6"Controllable Pump: Reef Octopus 36V VarioS-6S 300-SSS Space Saving Protein... -
Abyzz A1200 IPU (18,000 gph) 3M Cord Controllable DC Pump - Abyzz
Abyzz$8,084.99Internal or external application Splash-proof IP65 Rated Controller Super silent operation Fully controllable from 0-100% in 1% increments 10 Year Warranty! Abyzz A1200-3M 18,000GPH DC... -
Regal 200 SSS Space Saving Skimmer (200-400 Gallons) - Reef Octopus
Reef Octopus$947.09The new and innovative Reef Octopus Regal 200-SSS in-sump protein skimmer supplies powerful filtration for aquariums up to 400 gallons where sump space may be limited. The Reef Octopus Regal 200-SSS... -
Regal 250EXT Recirculating Protein Skimmer (Up To 600 Gallons) - Reef Octopus
Reef Octopus$1,270.49External Recirculating Skimmer for Aquariums up to 600 Gallons Footprint: 18.1" x 15.3" | Reaction Chamber: 10" | Height: 26.4"Controllable Pump: Reef Octopus 36V VarioS-6S 250-EXT Advanced Control... -
Regal 250 INT Protein Skimmer (300-600 Gallons) - Reef Octopus
Reef Octopus$993.29The new and innovative Reef Octopus Regal 250-INT in-sump protein skimmer supplies powerful filtration for aquariums up to 600 gallons where sump space is not limited. The Reef Octopus Regal 250-INT... -
VarioS-6S Controllable Skimmer Pump - Reef Octopus
Reef Octopus$519.74Efficiency: 36V / 70watts Dimensions: 5.11in(W) x 5.7in(L) x 4in(H) Controller Features: multiple pause times, float switch safety and 0-10v input for 3rd party controllerReplacement pump for... -
Regal 300EXT Recirculating Protein Skimmer (Up To 700 Gallons) - Reef Octopus
Reef Octopus$1,536.14External Recirculating Skimmer Rated for Aquariums up to 700 Gallons Footprint: 20" x 17.5" | Reaction Chamber: 12" | Height: 28.4"Controllable Pump: Reef Octopus 36V VarioS 300-EXT Advanced... -
Quantum 220 EQ Protein Skimmer (up to 500 Gallons) - NYOS Aquatics
NYOS$839.99Elevate your reef aquarium with the NYOS QUANTUM EQ, the smart protein skimmer that combines extreme performance with intelligent app control. Wirelessly connect via the Mobius or Apex Fusion app to... -
On Sale 10%
On Sale 10%(OPEN BOX) Quantum 300 EQ Protein Skimmer (up to 500 Gallons) - NYOS Aquatics
NYOS$1,579.99$1,420.99UNUSED CUSTOMER RETURN Elevate your reef aquarium with the NYOS QUANTUM EQ, the smart protein skimmer that combines extreme performance with intelligent app control. Wirelessly connect via the... -
Abyzz A400 IPU (4,900 gph) 3M Cord Controllable DC Pump - Abyzz
Abyzz$4,273.49MAX FLOW - 4,800 GPH | MAX HEAD - 45 FEET 6,060 GPH BOOSTMODE® max flow rate Internal or External application Fully Controllable from 0-100% in 1% increments MCFS® (Menu Controlled Flow... -
Octo VarioS-6 Controllable DC Water Pump - Reef Octopus
Reef Octopus$450.44Efficiency: 36V / 70watts Dimensions: 3.75in(W) x 5.7in(L) x 5.5in(H) Controller Features: multiple pause times, float switch safety and 0-10v input for 3rd party controllerIncludes:... -
Quantum 160 EQ Protein Skimmer (up to 125 Gallons) - NYOS Aquatics
NYOS$629.99Elevate your reef aquarium with the NYOS QUANTUM EQ, the smart protein skimmer that combines extreme performance with intelligent app control. Wirelessly connect via the Mobius or Apex Fusion app to... -
Quantum 300 EQ Protein Skimmer (up to 500 Gallons) - NYOS Aquatics
NYOS$1,579.99Elevate your reef aquarium with the NYOS QUANTUM EQ, the smart protein skimmer that combines extreme performance with intelligent app control. Wirelessly connect via the Mobius or Apex Fusion app to... -
Abyzz A400 IPU (4,900 gph) 10M Cord Controllable DC Pump - Abyzz
Abyzz$4,388.99MAX FLOW - 4,800 GPH | MAX HEAD - 45 FEET 6,060 GPH BOOSTMODE® max flow rate Internal or External application Fully Controllable from 0-100% in 1% increments MCFS® (Menu Controlled Flow... -
Octo VarioS-8 Controllable DC Water Pump - Reef Octopus
Reef Octopus$577.49Efficiency: 36V / 98watts Dimensions: 3.75in(W) x 5.7in(L) x 5.5in(H) Controller Features: multiple pause times, float switch safety and 0-10v input for 3rd party controllerIncludes:... -
Hydra Edge 44 HD Freshwater Aquarium Light - AquaIllumination
AquaIllumination$299.99Brilliance. Edge to Edge. Proven Spectrum. State-of-the-Art Spread and Shimmer. The All-New Hydra Edge Freshwater LED Proven spectrum. State-of-the-art shimmer and spread. The AI -
On Sale 9%
On Sale 9%(OPEN BOX) Octo VarioS-8 Controllable DC Water Pump - Reef Octopus
Reef Octopus$577.99$524.99BOX DAMAGED IN PALLET SHIPPING - PUMP FINE Efficiency: 36V / 98watts Dimensions: 3.75in(W) x 5.7in(L) x 5.5in(H) Controller Features: multiple pause times, float switch safety and 0-10v input... -
On Sale 15%
On Sale 15%Bulk Pharma Calcium Chloride (35 Pounds) - Bulk Reef Supply
Bulk Reef Supply$199.99$169.99Bulk Pharma Calcium Chloride - Ultra Pure Calcium Additive for your Reef Tank! Bulk Reef Supply 2-part additives are the perfect solution to replenish the intake of calcium and alkalinity coral... -
On Sale 15%
On Sale 15%Pharma Soda Ash 1 Gallon Mix (Single Use) - Bulk Reef Supply
Bulk Reef Supply$10.99$9.34Ultra-pure Grade Soda Ash for 2-part dosing in your reef tank! Bulk Reef Supply 2-part additives are the perfect solution to replenish the intake of calcium and alkalinity coral consumes when it... -
On Sale 15%
On Sale 15%Pharma Calcium Chloride 1-Gallon Mix (Single Use) - Bulk Reef Supply
Bulk Reef Supply$8.99$7.64Ultra-pure Calcium Chloride for 2-part dosing in your reef tank! Bulk Reef Supply 2-part additives are the perfect solution to replenish the intake of calcium and alkalinity coral consumes when it... -
On Sale 15%
On Sale 15%Pharma Sodium Bicarbonate - (1 Gallon Mix) - Bulk Reef Supply
Bulk Reef Supply$8.99$7.64Ideal for large changes in alkalinity levels or daily dosing in aquariums with high pH. Bulk Pharma Sodium Bicarbonate - Ultra-pure Alkalinity Additive for your Reef Tank! Bulk Reef Supply... -
On Sale 15%
On Sale 15%Bulk Pharma Sodium Bicarbonate - (35 lbs) - Bulk Reef Supply
Bulk Reef Supply$199.99$169.99Ideal for large changes in alkalinity levels or daily dosing in aquariums with high pH. Bulk Pharma Sodium Bicarbonate - Ultra-pure Alkalinity Additive for your Reef Tank! Bulk Reef Supply... -
On Sale 15%
On Sale 15%Pharma Soda Ash 5 Gallon Mix (Single Use) - Bulk Reef Supply
Bulk Reef Supply$179.99$152.99Ultra-pure Grade Soda Ash for 2-part dosing in your reef tank! Bulk Reef Supply 2-part additives are the perfect solution to replenish the intake of calcium and alkalinity coral consumes when it...
Featured Products
AR836 Algae Reactor 2026 (Commercial) - Geo's Reef
Geo's Reef
$1,849.00
The 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...
On Sale
15%
On Sale
15%
Red Acan Colony WYSIWYG - SAQ Coral Farm
Saltwater Coral Farm
$129.99
$110.49
Red Acan Colony WYSIWYG (Egg crate squares are 3/4")
If you are looking to buy vibrant color coral online to add to your reef tank, this is the best choice.
Red Acan Colony WYSIWYG is a fast...
On Sale
15%
On Sale
15%
7" NOSOK Filter Sock No Sock Replacement Silencer Cup - VCA
VCA Vivid Creative
$74.95
$63.71
Stop Washing Dirty Filter Socks Forever
Nobody likes dealing with a laundry bucket full of dirty, foul-smelling 7-inch filter socks. Traditional filter cups choke flow quickly, and automated fleece...
Free ICP Test Kit - ATI
ATI
$19.99
FREE ON ALL ORDERS OVER $150 - Just add to Cart!
ATI Free Seawater ICP
Free ICP test for your seawater!
With the ATI ICP test service you can send ATI a seawater sample. ATI will test your...
Carbo Ex Filter (1.5 Liter) - Includes 1000g Granulate - ATI
ATI
$44.95
ATI® Carbo Ex Filter 1.5L
The ATI® Carbo Ex Filter 1.5Lis a ready-to-use, single-use filter cartridge containing 1,000 grams (approx. 1.25 liters) of ATI Carbo Ex Media and a fine dust filter.ATI®...
ION-B Ca/Mg+ Powder (2.245g - Makes 6,000 mL) - NYOS
NYOS
$44.99
The Nyos® ION-B method is a state-of-the-art dosing system for modern reef tanks. The system is simple and intuitive and can be individually adapted to the needs of your aquarium.
With just two...
ION-B Ca/Mg+ Powder (1,122g - Makes 3,000 mL) - NYOS
NYOS
$24.99
The Nyos® ION-B method is a state-of-the-art dosing system for modern reef tanks. The system is simple and intuitive and can be individually adapted to the needs of your aquarium.
With just two...
ION-B ALK/pH+ Powder (1,342g - Makes 6,000 mL) - NYOS
NYOS
$44.99
The Nyos® ION-B method is a state-of-the-art dosing system for modern reef tanks. The system is simple and intuitive and can be individually adapted to the needs of your aquarium.
With just two...
ION-B ALK/pH+ Powder (671g - Makes 3,000 mL) - NYOS
NYOS
$24.99
The Nyos® ION-B method is a state-of-the-art dosing system for modern reef tanks. The system is simple and intuitive and can be individually adapted to the needs of your aquarium.
With just two...
On Sale
10%
On Sale
10%
BioSpace Reactor 8-2 (8" x 21") Up to 500 Gallons - Bashsea
Bashsea
$599.99
$539.99
Elevate 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...
On Sale
10%
On Sale
10%
BioSpace Reactor 6-2 (6" x 21") Up to 225 Gallons - Bashsea
Bashsea
$399.99
$359.99
Elevate 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...
On Sale
10%
On Sale
10%
BioSpace Reactor 4-2 (4" x 21") Up to 110 Gallons - Bashsea
Bashsea
$219.99
$197.99
Elevate 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...
On Sale
15%
On Sale
15%
4" NOSOK Filter Sock No Sock Replacement Silencer Cup - VCA
VCA Vivid Creative
$44.95
$38.21
Silence Your Sump and Simplify Your Maintenance Routine
Tired of the constant splashing and "gurgling" sounds coming from your filter socks? The VCA No-Sock 4-Inch Silencer is the ultimate solution...
On Sale
15%
On Sale
15%
Small-In-One Nomad Portable Traveling Aquarium (0.5 Gallon) - PNW Custom
PNW Custom
$349.99
$297.49
0.5 Gallon Fully Sealed Traveling Aquarium
The world’s first fully sealed traveling aquarium.
The Small-In-One Nomad is a compact 0.5-gallon aquarium designed for safely transporting and displaying...
On Sale
15%
On Sale
15%
MEGA Filtra 950 SDC Aquarium Canister Filter Up to 250 Gal (568 gph) - Sicce
Sicce
$499.99
$424.99
Experience the next generation of aquarium filtration with the Sicce Mega Filtra Series. Entirely designed and manufactured in Italy, these premium canister filters combine heavy-duty
On Sale
15%
On Sale
15%
MEGA Filtra 900 Aquarium Canister Filter Up to 240 Gal (410 gph) - Sicce
Sicce
$349.99
$297.49
Experience the next generation of aquarium filtration with the Sicce Mega Filtra Series. Entirely designed and manufactured in Italy, these premium canister filters combine heavy
On Sale
15%
On Sale
15%
MEGA Filtra 650 Aquarium Canister Filter Up to 170 Gal (380 gph) - Sicce
Sicce
$299.99
$254.99
Experience the next generation of aquarium filtration with the Sicce Mega Filtra Series. Entirely designed and manufactured in Italy, these premium canister filters combine heavy
ReefControl Power 8 Deluxe w/Panel - Red Sea
Red Sea
$389.00
Get the best of both worlds with the ReefControl Power 8 Deluxe. This kit combines the 8-socket ReefBeat-controlled smart power center with the dedicated manual Control Panel 8, giving you the...
ReefControl Power 8 - Red Sea
Red Sea
$319.00
Welcome to the future of aquarium management. The ReefControl Power 8 is more than just a power strip; it's the brain of your operation, integrating seamlessly into the Red Sea ReefBeat ecosystem to...
ReefControl Pro Deluxe Kit Aquarium Controller - Red Sea
Red Sea
$699.00
The ReefControl Pro is the flagship smart controller for the Red Sea ReefBeat ecosystem. It acts as the central brain for all your monitoring and automation, allowing you to connect up to 7 ReefSense...