Classic 90 HOB Skimmer Reef Octopus

Reef Octopus Classic 90 HOB Skimmer for Real-World Reef Filtration

The Reef Octopus Classic 90 HOB Skimmer gives saltwater tanks a dependable way to pull out gunk, film, and dissolved waste without taking up sump space. Reef aquarists who browse Reef Octopus gear in the Filtration and Skimmers section usually want strong performance without a learning curve, and this model brings that balance comfortably.

Practical Everyday Performance With the Classic 90 HOB Skimmer

The Classic 90 HOB Skimmer places a cylindrical body behind the tank, pulls surface film aggressively, and uses balanced bubble movement to strip out organics fast. In the HOB (Hang-On the Back) Skimmers area, this one stays popular because it avoids gimmicks and just works, whether you run a soft coral tank or a nutrient-heavy fish setup.

Setup doesn’t drag on, tuning doesn’t feel complicated, and the skimmate cup lifts off easily when it’s time to empty it. Most hobbyists appreciate that simplicity day-to-day, especially during water-change mornings.

What Sets the Classic 90 Apart

This skimmer focuses on doing basic things right: steady air intake, consistent foam head, and quiet movement. The pump sits outside the body, so heat stays out of the water, and the bubble plate keeps turbulence low for cleaner foam collection.

Key highlights:

• Cylindrical reaction body for balanced foam rise

• Aquatrance 1000s pinwheel pump

• Surface intake for film and protein removal

• Bubble plate to stabilize air-water mix

• Quiet operation with air silencer

• Tool-free skimmate cup removal

• Output valve for fine tuning

• Long-lasting acrylic build

Tank Capacity Guidance

Different systems feed differently, so capacity varies by bioload:

• Heavy stock levels: up to 60 gallons

• Moderate stock levels: up to 90 gallons

• Light stock levels: up to 130 gallons

Dimensions

• Body Diameter: 4 in

• Footprint: 7.5 in x 7.5 in

• Height: 23.8 in

Pump Specs

• Model: Aquatrance 1000s

• Power Draw: 9 watts

• Water Flow: 92 GPH

• Air Pull: 15 SCFH*
  Performance always varies slightly tank to tank.

A Skimmer That Prioritizes Consistency

Saltwater tanks stay healthier when organics never get the chance to linger. The Classic 90 HOB Skimmer brings strong oxygenation, easy access for maintenance, and dependable daily performance for reefers who prefer equipment that stays out of the way and does not ask for babysitting.

More For Your System

• You can browse Aquarium Filters in the catalog and match one to your tank size and bioload.
• Discover dependable picks in Box and HOB Filters, then match one to your current livestock load.
• Start with All Filter Media to tune water clarity without changing your main filter.

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