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Octo CLSC-152S Aquatrance Venturi (AQ1800S)
SKU: ROP-AQ1800-V152
- 100% Genuine OEM Factory Part: Manufactured directly by Reef Octopus as an exact drop-in structural match to swap out cracked, loose, or calcium-blocked intake nozzles.
- Custom Space Saver Clearance: Engineered with precise physical dimensions tailored to clear the internal walls of the compact Classic 152-S skimmer body.
- Hydrodynamically Focused Constriction: Pinpoints internal fluid paths to exploit the Venturi effect, pulling up to 511 L/H of clean ambient air into the motor block.
- High-Impact Saltwater-Safe ABS: Injection-molded from a dense, non-leaching polymer matrix that resists brittle stress fractures and salt creep breakdown.
- Integrated Airline Barbed Nipple: Features a molded vertical air intake nipple tailored to grab standard 1/4-inch flexible silicone skimmer airline tubes.
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
Reef Octopus Aquatrance 1800S Space-Saving Venturi Adapter (SKU: ROP-AQ1800-V152)
The Reef Octopus Aquatrance 1800S Space-Saving Venturi Adapter (SKU: ROP-AQ1800-V152) is an authentic, internal OEM air-induction component distributed by CoralVue to protect high-density bubble columns inside space-saving internal protein skimmers. In space-saving configurations like the Classic 152-S, the Aquatrance 1800S pump is tucked directly inside the wine-glass-shaped "Super Cone" body tower to dramatically reduce the skimmer's footprint in tight sump compartments. Because space inside the curved acrylic shell is highly restricted, standard extended venturi horns will ram straight into the clear walls. The ROP-AQ1800-V152 layout utilizes a specialized compact profile that permits total pump clearance without restricting vital vacuum suction.
Molded from high-grade, marine-strength ABS plastic, this venturi slides directly onto the intake faceplate casing of the Aquatrance 1800S (11W) skimmer pump. It stands as the direct factory-correct replacement for the popular Classic 152-S (CLSC-152S) Protein Skimmer, ensuring that air entering through your silencer line is cleanly mashed by the needlewheel matrix. By keeping an airtight connection on the suction side of your pump housing, this part guarantees a continuous column of waste-removing micro-bubbles.
Key Features
Corrects Dropped Air-Intake Rates: Rectifies weak foam production caused by loose or hair-fractured legacy fittings, keeping baseline air draw at an aggressive 480–511 L/H.
Tool-Free Slide Fitting Updates: High-tolerance friction-slip geometry pushes directly into position over the factory pump volute, bypassing messy glues.
100% Inert Reef Safety Line: Formulated using pure injection structural polymers that will never leach manufacturing chemical stabilizers or toxins into delicate coral reef tanks.
(Note: This retail SKU contains (1) individual Aquatrance 1800S Venturi Adapter nozzle. Silicone lines, air silencers, internal pinwheel impellers, and full pump stators are sold under separate product categories).
Reef Octopus Aquatrance Venturi Adaptation Matrix
| Component Classification Scale | Material SKU Identifier | Onboard Base Connection Track | Primary Target Skimmer Platform Match |
|---|---|---|---|
| Aquatrance Venturi AQ1000S | ROP-AQ1000-V | Standard Extended Slip | Classic 110-INT, Classic 110EXT Recirculating |
| Aquatrance Venturi AQ110S | ROP-AQ110S-V | Low-Profile SSS Slide | Classic 110-SSS Space Saver Sump Lines |
| Aquatrance Venturi AQ130S | ROP-AQ130S-V | Specialized Slide Fit | eSsence S-130 In-Sump Space Saver Units |
| Aquatrance Venturi AQ1800S | ROP-AQ1800-V152 | Compact SSS Clearance Slip | Classic 152-S Space Saving Super Cone (CLSC-152S) |
What’s Included:
(1) Reef Octopus Aquatrance Replacement 1800S Venturi Adapter Nozzle for Classic 152-S
Technical Specs:
Official Manufacturing Title: Reef Octopus Aquatrance Venturi for AQ1800S (CLSC-152S)
SKU / Factory Part Identifier: ROP-AQ1800-V152
Air Induction Connection Interface: Standard 1/4-Inch Integrated Slotted Barbed Nipple
Primary Structural Material Base: Saltwater-Safe Hardened High-Impact Injection ABS Plastic
Profile Geometry Dimensioning: Custom Length/Throat Configuration for 152-S Sump Clearance
Chassis Platform Compatibility: Form-Fitted for Reef Octopus Classic 152-S In-Sump Wine-Glass Super Cone Skimmers
Unplug your Reef Octopus Classic 152-S protein skimmer pump from its electrical wall outlet. Lift the full skimmer out of your sump and move it to a clear workspace.
Remove the collection cup, and take off the internal bubble diffusion plate to expose the Aquatrance 1800S pump tucked into the skimmer floor base.
Pull the soft flexible silicone airline tubing away from the barbed intake nipple on your old, worn venturi nozzle. Slide the pump slightly out of its floor retention tracks if needed to gain clearance.
Slide the old venturi straight out and away from the suction port of the front pump volute cover. Pro Tip: If dried salt creep or calcium scaling has locked the plastic parts together, soak the joint in warm water and white vinegar for 10 minutes before pulling.
Push your fresh ROP-AQ1800-V152 venturi nozzle firmly over the center intake ring of the volute cover until it seats squarely against the shoulder stop.
Re-attach your silicone airline back onto the barbed vertical nipple, lower your bubble diffusion assembly back into place, slide the pump back down into its floor slots, and place the skimmer back into your sump.
Pro Tips:
- Never Mistake This 152-S Adapter for the Standard eSsence S-130 Venturi. Because Reef Octopus operates a few distinct styles of the Aquatrance 1800S skimmer pump intake across their lines, it is incredibly easy to buy the wrong part variant by mistake. While the underlying 11W motor block is identical, the eSsence S-130 space saver uses the ROP-AQ130S-V nozzle. If you try to force that variant or a standard internal block venturi inside the highly distinct wine-glass "Super Cone" shape of the Classic 152-S, it will ram into the sloped wall panels. Always select the V152-specific identifier to ensure a flawless fit.
- Routinely Scrub the Internal Air Nipple to Eliminate Silent Salt Clogging. If you notice your space saver skimmer's performance dropping off over time, or if the water level inside the column keeps overflowing inexplicably, the problem is almost always a hard salt clog inside the venturi rather than a mechanical pump failure. Because the pump aggressively draws in ambient air, saltwater will naturally splash back into the line, drying out and creating a hard column of white calcium or salt creep inside the narrow intake nozzle. This restriction chokes off air draw, causing the pump to pull only water and flood the skimmer cup. Every 4 to 6 weeks, slide a small pipe cleaner or a stiff bristle brush through the air nipple to keep paths completely clear.
- Never Use Pliers or Hand Tools to Force the Venturi Onto the Volute Ring. Because this genuine OEM part is molded to exceptionally tight tolerances to form a perfect hydraulic vacuum seal, pressing the rigid plastic components together dry can sometimes feel very stiff. Avoid the temptation to grab a pair of household metal pliers to force the pieces together, as this will easily split the ABS plastic collar. Instead, wipe a tiny drop of fresh RO water inside the receiving sleeve of the new venturi. This acts as a safe, clean lubricant, allowing the adapter to slide into place smoothly without over-stressing the plastic structure.