Octo Classic 2000 HOB Protein Skimmer

Reef Octopus Classic 2000-HOB Protein Skimmer

The Reef Octopus Classic 2000-HOB (SKU: CLSC-2000HOB) is a high-capacity hang-on-back protein skimmer designed to deliver professional-grade organic waste removal to large marine aquariums up to 200 gallons without the need for an underlying sump system. Engineered specifically for serious hobbyists with standalone reef setups or heavy-bioload fish-only systems, the Classic 2000-HOB maximizes space efficiency. By positioning its powerful Aquatrance 2000s pinwheel pump externally underneath the main skimmer housing rather than inside the tank, you only need 4 inches of clearance behind your aquarium while completely isolating pump motor heat from your sensitive livestock.

Constructed entirely from premium, heavy-duty cast acrylic, this external hang-on unit features an adjustable surface skimmer box that actively skims the water line to break up the organic slick that impedes vital gas exchange and light penetration. Inside the large reaction chamber, the Aquatrance pump aggressively chops air and water into a dense cloud of micro-bubbles, stripping out dissolved proteins before they can degrade into harmful nitrates and phosphates. With its massive collection cup, simple O-ring adjustments, and modular construction, the Classic 2000-HOB is a powerhouse option for pristine water quality.

Key Features

• Heavy-Duty Sump-Less Performance: Easily hangs on the rim of large aquariums, bringing advanced filtration to non-plumbed systems.

• Aquatrance 2000s Pinwheel Pump: Infuses a massive 720 L/H of air pull into the reaction chamber while running at an efficient 18 Watts.

• Dual Chamber Internal Geometry: Separates the chaotic bubble reaction zone from the water return chamber to drastically limit micro-bubble bypass.

• Surface Degreaser Attachment: Continuously strips protein-heavy surface film to improve water clarity and light penetration.

• Bubble-Dampening Assembly: Utilizes specialized foam sponges to calm the discharge water column as it returns to the display.

Bioload Handling

• Heavy Bioload: 80 Gallons

• Medium Bioload: 120 Gallons

• Light Bioload: 200 Gallons