Octo NK8000EXT Neck Extension
SKU: OCT-NK-8000EXT
• Adds 3.5 inches of vertical height to the skimmer neck
• Substantially increases bubble dwell time for more efficient dissolved organic removal
• Precision-machined high-quality acrylic ensures a seamless, leak-free fit with the skimmer body
• Stackable design allows for aggressive tuning of internal water levels and foam dry-out
• Ideal For: SRO-7000EXT; SRO-8000EXT; Large-scale reef systems
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
Reef Octopus NK-8000EXT Neck Extension
The Reef Octopus NK-8000EXT Neck Extension is a high-performance modification designed specifically for the SRO-7000EXT and SRO-8000EXT external protein skimmers, providing a 3.5-inch increase in neck height. This additional vertical space is critical for maximizing "dwell time"—the duration air bubbles remain in contact with dissolved organics—within the reaction chamber. By extending the neck, the NK-8000EXT facilitates a taller, more stable foam column, leading to a higher concentration of waste captured in the collection cup.
Crafted from premium cast acrylic to match the industrial-grade durability of Reef Octopus’s professional external skimmers, the NK-8000EXT offers the structural integrity required for heavy-duty reef filtration. It is the ideal solution for hobbyists and professionals managing massive bioloads who want to push their existing 7000 or 8000-series equipment to peak efficiency. These extensions are stackable, providing the modular flexibility needed to adjust filtration performance based on specific nutrient export goals and system requirements.
Key Features
• Maximum Height Increase: Adds 3.5 inches to the neck to facilitate an exceptionally stable foam column.
• Superior Dwell Time: Extended bubble contact results in more efficient protein and organic removal.
• Precision Engineering: Designed to maintain a perfect seal with Reef Octopus 8000-series skimmer bodies.
• High-Grade Construction: Manufactured from heavy-duty acrylic for long-term clarity and strength.
• Adjustable Performance: Stackable design allows for customized height settings and water level control.
Ideal For
• SRO-7000EXT Owners: Fits the external Super Reef Octopus 7000 model.
• SRO-8000EXT Users: Directly compatible with the external Super Reef Octopus 8000 model.
• Professional Installations: Commercial-sized reef tanks where maximum organic export is mandatory.
• Custom Tuning: Users looking to achieve a drier, more concentrated skimmate through increased neck height.
What's Included:
• NK-8000EXT 3.5-Inch Neck Extension
• Sealing O-ring
Specifications:
• Height: 3.5 inches
• Material: High-quality Cast Acrylic
• Color Black
• Model Compatibility: SRO-7000EXT / SRO-8000EXT
• Warranty: 1-Year Limited Warranty
Warranty
CoralVue, Inc. hereby guarantees this product to be free from defects in material and workmanship for a period of:
- 1 Year
Warranty is activated on the date of purchase.
This Standard Limited Warranty applies and is limited as follows:
- To the product only as long as it remains in the possession of the original purchaser.
- To the product that has not been subject to accident, misuse or abuse.
- To the product that has not been modified, altered, defaced, or had repairs made or attempted by other than CoralVue, Inc.
- That CoralVue be immediately notified in writing within ten (10) days of first knowledge of defect by owner or his agent.
- That CoralVue, Inc. shall be given first opportunity to make any repairs, replacements or corrections to the defective construction within a reasonable period of time.
- Under no circumstances shall CoralVue and/or the Manufacturer be liable by virtue of this warranty or otherwise for damage to any person or property whatsoever for any special, indirect, secondary or consequential damages of any nature however arising out of the use or inability to use because of the product defect.
- Turn off the protein skimmer pump and remove the collection cup.
- Ensure the O-ring on the NK-8000EXT extension is clean and properly seated in the groove.
- Align the extension with the skimmer neck and press down firmly to create an airtight seal.
- Reinstall the collection cup on top of the extension.
- Restart the skimmer and monitor the water level; adjustment of the outlet valve may be necessary to compensate for the added height.
Pro Tips:
Confirm your vertical clearance.
Adding a 3.5-inch extension to these large external units creates a very tall assembly. Ensure you have at least 5 inches of clearance above your new total skimmer height to comfortably remove the collection cup for maintenance.
Lubricate O-rings for ease of maintenance. Applying a thin layer of aquarium-safe silicone lubricant to the O-ring will prevent the acrylic from seizing over time and make it much easier to disassemble the unit for deep cleaning.
Fine-tune for "Dry" skimmate. If your skimmer currently produces a light, watery waste, the NK-8000EXT is an excellent way to allow the foam more time to "dry out" as it rises, resulting in a darker, more concentrated skimmate.