Octo Classic 100 HOB Collection Cup O-ring
SKU: ROP-CC-OR-100HOB
• Maintain a secure, airtight seal between the skimmer body and collection cup for stable foam.
• Genuine Reef Octopus replacement part specifically for the Classic 100 HOB (BH-100) model
• Prevents air bypass and messy salt creep from forming at the neck junction
• High-quality, flexible rubber construction resists saltwater degradation
• Essential for maintaining the friction-fit height adjustment of the cup
• Ideal For: Classic 100 HOB owners; leaking skimmer necks; brittle or cracked seals
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
Reef Octopus Classic 100 HOB Collection Cup O-Ring
The Reef Octopus Classic 100 HOB Collection Cup O-Ring (SKU: ROP-CC-OR-100HOB) is a vital sealing component for the Reef Octopus BH-100 hang-on-back protein skimmer. This O-ring sits in the precision-machined groove on the skimmer neck, providing the necessary friction to hold the collection cup at your desired height while simultaneously creating an airtight seal.
In a hang-on-back skimmer, a functional O-ring is critical for preventing salt creep from weeping down the exterior of the unit and onto your aquarium stand or floor. Over time, exposure to the high-ozone and high-salt environment of a skimmer neck can cause the original rubber to flatten or become brittle. Replacing your O-ring with this genuine Reef Octopus part restores the "grip" on the collection cup, allowing for easy micro-adjustments to your foam level and ensuring a quiet, leak-free operation.
Key Features
• Precision Fit: Specifically sized for the diameter of the Classic 100 HOB (BH-100) neck.
• Airtight Performance: Seals the reaction chamber to maintain consistent internal air pressure.
• High Friction Grip: Provides the vertical stability needed to prevent the collection cup from sliding out of position.
• Durable Material: Made from saltwater-resistant rubber designed for long-term flexibility.
• OEM Reliability: A genuine Reef Octopus replacement part for guaranteed compatibility.
Ideal For
• Classic 100 HOB Owners: The direct replacement for the standard BH-100 model.
• Leaking Skimmer Necks: Fixing units where skimmate or air is escaping from the cup junction.
• Restoring Height Control: Replacing flattened O-rings that no longer hold the collection cup in place.
What’s Included: • (1) Classic 100 HOB Collection Cup O-Ring
Specifications:
• SKU: ROP-CC-OR-100HOB
• Compatible Skimmer: Reef Octopus Classic 100 HOB (BH-100)
• Material: High-grade Silicone
• Color: Clear
• Manufacturer: Reef Octopus
Turn off the protein skimmer pump.
Gently twist and lift the collection cup to remove it from the skimmer body.
Remove the old O-ring from the groove located on the internal neck of the skimmer body.
Clean the groove thoroughly with a damp cloth to remove any salt or organic buildup.
Slide the new O-ring into the groove, ensuring it is seated evenly and not twisted.
Reinstall the collection cup by sliding it back through the O-ring to your desired depth.
Pro Tips
Lubricate for Height Adjustment.
Apply a light coating of aquarium-safe silicone lubricant to the O-ring. This not only protects the rubber but makes it significantly easier to slide the collection cup up and down when fine-tuning your skimmer's performance.
Stop the "Slide." If your collection cup keeps sliding down into the water despite a new O-ring, make sure the exterior of the cup neck is clean and free of algae or slime. A quick wipe with a vinegar-soaked cloth will restore the grip.
Prevent Floor Damage. Because HOB skimmers hang outside the tank, even a tiny leak at the O-ring can eventually drip onto your floor. Inspect this O-ring every few months as part of your routine maintenance to catch cracks before they lead to water damage.