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  • Reef Octopus Classic 110-INT in-sump protein skimmer
  • Reef Octopus Classic 150-INT in-sump protein skimmer
  • Reef Octopus Classic 200-INT in-sump protein skimmer
  • Sku: CLSC-110INT

Reef Octopus Classic INT In-Sump Protein Skimmer

$326.85 USD
In stock!
Model: Classic 110-INT
In-Store Pickup Only — order online and pick up at the store. This item does not ship.

Product description

In-store pickup only. Reserve it online and collect it at the store. This item does not ship.

The Reef Octopus Classic INT In-Sump Protein Skimmer is a proven, hand-made cast-acrylic skimmer that pulls dissolved organic waste out of your reef aquarium before it becomes nitrate and phosphate. Reef Octopus builds its own Aquatrance pinwheel pumps specifically for skimming, so each model delivers a dense, waste-grabbing foam and reliable performance that has been trusted by reefers for over a decade. Three sizes cover reef systems up to 250 gallons. Explore more of our reef and saltwater gear.

Purpose-built skimming. Reef Octopus is the original protein-skimmer maker to design its own pumps. Each Classic INT pairs a hand-made cast-acrylic body with a matched Aquatrance pinwheel pump, an air silencer, and a precision water-level control valve for quiet, tunable, in-sump filtration.

How It Works

The Aquatrance pinwheel pump shreds incoming air into a cloud of fine bubbles that bind to proteins and organic waste. As that foam rises through the half-cone hybrid body, it concentrates and carries the waste up into the quick-release collection cup for removal. The gate valve lets you fine-tune the water level and foam for wet or dry skimmate to match your tank.

Features — All Models

Aquatrance Pinwheel PumpReef Octopus builds its own skimmer pumps for a dense, efficient bubble stream.
Cast Acrylic BodyHand-made, high-quality cast acrylic built to last in saltwater.
Half-Cone Hybrid BodyConcentrates the rising foam column for strong waste removal.
Precision Gate ValveEasy-adjust output valve dials in the internal water level and skimmate.
Quick-Release Collection CupTwist-off cup with a built-in drain for fast, tidy cleaning.
Air SilencerKeeps the venturi air intake quiet during operation.
Bubble DiffuserSmooths water flow leaving the skimmer for cleaner sump conditions.
5-Year Pump WarrantyBacked by a 5-year warranty on the pump body and housing.

Choose Your Size — Model Comparison

Select a model in the tabs below for its full individual spec sheet.

Spec 110-INT 150-INT 200-INT
Light Bioload Up to 130 gal Up to 210 gal Up to 250 gal
Medium Bioload Up to 90 gal Up to 150 gal Up to 200 gal
Heavy Bioload Up to 60 gal Up to 110 gal Up to 150 gal
Skimmer Pump Aquatrance 1000s Aquatrance 2000s Aquatrance 3000s
Wattage 9 W 18 W 35 W
Max Air Draw 420 L/h (15 SCFH) 720 L/h (25.2 SCFH) 900 L/h (31.5 SCFH)
Max Water Flow 350 L/h (92 GPH) 750 L/h (198 GPH) 800 L/h (211 GPH)
Body Diameter 5 in 6 in 8 in
Neck Size 2.4 in 3.2 in 4.75 in
Footprint (LxW) 10.2 x 6.9 in 12.4 x 8.7 in 14.6 x 10.25 in
Total Height 19.7 in 22 in 24 in
Output 40 mm / 1.25 in PVC 40 mm / 1.25 in PVC 50 mm / 1.5 in PVC
Price $326.85 $381.14 $473.54
SKU CLSC-110INT CLSC-150INT CLSC-200INT

Detailed Model Specifications

Click a model below to view its complete specification sheet.

Classic 110-INT · Up to 130 gal · Aquatrance 1000s · 5 in body

The Reef Octopus Classic 110-INT is a cast-acrylic in-sump skimmer driven by the Aquatrance 1000s pinwheel pump. It suits reef aquariums up to 130 gallons at a light bioload, 90 gallons at a medium bioload, or 60 gallons at a heavy bioload (sump volume excluded).

Specification Value
SKU CLSC-110INT
Price $326.85
Rated Tank Size Up to 130 gallons
Light Bioload Up to 130 gallons
Medium Bioload Up to 90 gallons
Heavy Bioload Up to 60 gallons
Skimmer Pump Reef Octopus Aquatrance 1000s pinwheel
Wattage 9 W
Air Draw 420 L/h (15 SCFH)
Water Draw 350 L/h (92 GPH)
Body Diameter 5 in
Neck Size 2.4 in
Footprint (L x W) 10.2 x 6.9 in
Total Height 19.7 in
Overall (L x W x H) 10.2 x 6.9 x 19.7 in
Output Size 40 mm / 1.25 in PVC
Recommended Sump Water Height 7 to 8 in
Construction Hand-made cast acrylic, half-cone hybrid body
Water Type Saltwater and reef
Warranty 5-year pump body, 1-year power supply and impeller

Classic 150-INT · Up to 210 gal · Aquatrance 2000s · 6 in body

The Reef Octopus Classic 150-INT is a cast-acrylic in-sump skimmer driven by the Aquatrance 2000s pinwheel pump. It suits reef aquariums up to 210 gallons at a light bioload, 150 gallons at a medium bioload, or 110 gallons at a heavy bioload (sump volume excluded).

Specification Value
SKU CLSC-150INT
Price $381.14
Rated Tank Size Up to 210 gallons
Light Bioload Up to 210 gallons
Medium Bioload Up to 150 gallons
Heavy Bioload Up to 110 gallons
Skimmer Pump Reef Octopus Aquatrance 2000s pinwheel
Wattage 18 W
Air Draw 720 L/h (25.2 SCFH)
Water Draw 750 L/h (198 GPH)
Body Diameter 6 in
Neck Size 3.2 in
Footprint (L x W) 12.4 x 8.7 in
Total Height 22 in
Overall (L x W x H) 12.4 x 8.7 x 22 in
Output Size 40 mm / 1.25 in PVC
Recommended Sump Water Height 6 to 8 in
Construction Hand-made cast acrylic, half-cone hybrid body
Water Type Saltwater and reef
Warranty 5-year pump body, 1-year power supply and impeller

Classic 200-INT · Up to 250 gal · Aquatrance 3000s · 8 in body

The Reef Octopus Classic 200-INT is a cast-acrylic in-sump skimmer driven by the Aquatrance 3000s pinwheel pump. It suits reef aquariums up to 250 gallons at a light bioload, 200 gallons at a medium bioload, or 150 gallons at a heavy bioload (sump volume excluded).

Specification Value
SKU CLSC-200INT
Price $473.54
Rated Tank Size Up to 250 gallons
Light Bioload Up to 250 gallons
Medium Bioload Up to 200 gallons
Heavy Bioload Up to 150 gallons
Skimmer Pump Reef Octopus Aquatrance 3000s pinwheel
Wattage 35 W
Air Draw 900 L/h (31.5 SCFH)
Water Draw 800 L/h (211 GPH)
Body Diameter 8 in
Neck Size 4.75 in
Footprint (L x W) 14.6 x 10.25 in
Total Height 24 in
Overall (L x W x H) 14.6 x 10.25 x 24 in
Output Size 50 mm / 1.5 in PVC
Recommended Sump Water Height 7.5 to 8.5 in
Construction Hand-made cast acrylic, half-cone hybrid body
Water Type Saltwater and reef
Warranty 5-year pump body, 1-year power supply and impeller

Choosing by Bioload

Skimmer sizing depends on how heavily your tank is stocked and fed, not just water volume. Use the Heavy Bioload rating for a fish-heavy or heavily fed tank, Medium for a typical mixed reef, and Light for a lightly stocked or LPS/soft-coral system. Sump volume is not counted toward the rating, and when in doubt you should size up.

Which Model Is Right for You?

Classic 110-INT — Nano to mid reefs, up to 130 gallons light or 60 gallons heavily stocked. Compact 5 in body for smaller sumps.

Classic 150-INT — Mid-size reefs up to 210 gallons, with a larger 6 in body and the stronger Aquatrance 2000s pump.

Classic 200-INT — Large reefs up to 250 gallons. The 8 in body and Aquatrance 3000s pump move the most air and water in the Classic INT line.

FAQ

What does a protein skimmer do?
It removes dissolved organic waste as foam before it decays into nitrate and phosphate, keeping water cleaner and corals healthier.

Is this an in-sump skimmer?
Yes. Each Classic INT model runs submerged in a sump at the recommended water height in its spec sheet.

Do I need a separate pump?
No. The matched Reef Octopus Aquatrance pinwheel pump is included with every model.

How do I pick the right size?
Match the model to your system volume and bioload using the comparison table and the Light, Medium, and Heavy ratings in each spec sheet. Heavily stocked tanks should size up.

Freshwater or saltwater?
Protein skimmers are for saltwater and reef aquariums.

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Reef Octopus Classic INT In-Sump Protein Skimmer

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