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Octo Classic 90 HOB Protein Skimmer
SKU: CLSC-90HOB
MSRP: $ 375,36
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Available Through Authorized Retailer
- Unique Cylindrical Body: Breaks away from traditional boxy HOB designs, utilizing a 4-inch cylindrical reaction chamber to manage air gently and minimize turbulence.
- External Pump Placement: The Aquatrance 1000s pump is mounted externally underneath the skimmer chassis, saving valuable space inside and behind your tank.
- Surface Skimmer Intake: Features a specialized intake assembly that skims the water's surface, clearing away organic oil slick to optimize light penetration.
- Zero Heat Transfer: Keeping the pump motor completely out of the aquarium prevents unwanted heat from shifting your display tank's temperature.
- Quiet Bubble Management: Outfitted with an integrated air silencer and a bubble-dampening discharge sponge to eliminate microbubble bypass.
- Premium Build: Handcrafted with high-quality cast acrylic and features a traditional-style collection cup equipped with a dedicated waste drain.
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
Reef Octopus Classic 90-HOB Protein Skimmer
The Reef Octopus Classic 90-HOB (SKU: CLSC-90HOB) takes a completely fresh approach to hang-on-back filtration. While standard HOB skimmers rely on boxy, rectangular chambers that can cause performance-robbing water turbulence, the Classic 90-HOB features a true cylindrical 4-inch reaction chamber. This architectural design, combined with a smooth conical body-to-neck transition, handles the air-and-water mixture incredibly gently. The result is a highly stable, uniform foam column that efficiently strips dissolved organic compounds out of aquariums up to 130 gallons without ever requiring a sump.
Driven by the ultra-efficient Aquatrance 1000s pinwheel pump, this skimmer is uniquely configured with the motor hanging externally beneath the main acrylic body. This layout ensures a remarkably slim profile that requires minimal clearance behind your aquarium glass. Additionally, the intake plumbing features a built-in surface skimmer box. By constantly drawing water directly from the surface line, it strips away the protein-heavy oil film that naturally accumulates and blocks light. With its robust cast acrylic construction, quiet air silencer, and easy-to-empty collection cup, the Classic 90-HOB delivers pristine water quality to standalone marine systems.
Key Features
Turbulence-Reducing Cylinder: Circular design allows microbubbles to rise smoothly without colliding or popping prematurely.
Aquatrance 1000s Pump: Pulls 420 L/H of air while consuming an energy-saving 9 Watts of power.
Integrated Surface Degreaser: Keeps the top of your water column pristine, maximizing gas exchange and PAR penetration.
Precision Control Output: A fine-tuned gate valve mechanism allows you to dictate exactly where the water line rests inside the body.
Sump-Free Adaptability: The perfect elite filtration upgrade for standard, standalone rimmed or rimless saltwater aquariums.
Bioload Handling
Heavy Bioload: 60 Gallons
Medium Bioload: 80 Gallons
Light Bioload: 130 Gallons
What’s Included:
(1) Reef Octopus Classic 90-HOB Skimmer Body
(1) Aquatrance 1000s Pinwheel Pump
(1) Surface Skimming Intake Assembly
(1) Output Valve & Bubble Stopper Sponge Device
(1) Air Silencer & Airline
Technical Specs:
Model / SKU: CLSC-90HOB (Formerly BH-90)
Body Size (Diameter): 4 in
Footprint: 7.5 in x 7.5 in
Total Height: 23.8 in
Pump Wattage: 9W
Air Draw: 420 L/H (15 SCFH)
Water Draw: 350 L/H (92 GPH)
Reef Octopus Aquatrance 1000S Pinwheel Pump
Wattage: 9w
Air Draw: 420 lph / 15 SCFH*
Water Draw: 350 lph / 92 GPH*
*Air and water results will vary depending on aquarium setup
WARRANTY
CoralVue, Inc. and Reef Octopus hereby guarantee this product to be free from defects in material and workmanship for a period of:
- Five (5) year warranty on pump body/housing
- Three (3) year warranty on Reef Octopus-branded controller
- One (1) year warranty on Power Supply, Impeller (and components), Rotor, Rear Bushing, and Gaskets
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.
- Assemble the intake piping, surface skimmer attachment, and the underlying external Aquatrance 1000s pump.
- Hang the cylindrical skimmer body onto the rim of your aquarium, using the plastic thumbscrews at the base to ensure the unit hangs perfectly level.
- Manually prime the system by pouring aquarium water directly into the main skimmer chamber until it reaches roughly 8 inches (20cm) deep.
- Completely pinch or seal the air silencer hose to block air intake, then plug the pump into a GFCI wall outlet.
- Once the pump forces water through the pipes and establishes a full siphon loop, release the airline to kickstart active microbubble production.
- Adjust the precision control output valve so that the microbubble foam transition settles right at the base of the collection cup neck.
Pro Tips:
- Airline Siphon Trick. If the Aquatrance pump struggles to clear the air out of the intake plumbing during installation or after a cleanup, keep the air valve closed for up to 30 seconds. Blocking the air path forces the pump to pull a pure hydraulic vacuum, which rapidly primes the water siphon loop.
- Keep the Output Sponge Elevated. Position the output bubble stopper sponge so it sits slightly above your aquarium's water line. This allows returning water to vent air smoothly, drastically reducing the amount of tiny microbubbles that can otherwise get blasted downward into your display tank.
- Monthly Venturi Maintenance. Because the pump draws air from a humid area right against the back of the tank, the small venturi nozzle can slowly accumulate salt crust. Every month, pull the flexible airline and give the gray injection nozzle a poke with a toothpick, or squirt a few milliliters of warm RO/DI water down the tube to instantly melt away any hidden salt blockages.