Automatic Fleece Roller Aquarium Filter for Standard 4-Inch Sock Holders and Supported AIO Systems

This automatic fleece roller aquarium filter uses advancing fleece for continuous mechanical filtration in freshwater and marine systems. Its compact, cone-style fitting seats in most standard 4-inch filter sock holders, helping you use existing sump positions rather than dedicate a large bay to one oversized roller.

The Nature Dimensions system can run one, two, or three filter bodies through a main controller. Choose a Main unit for standalone operation or add Extension units for synchronized filtration across multiple sock openings. Extensions require a main filter controller and do not include their own controller, sensor, or power adapter.

Each filter body is rated for up to 800 GPH. As a general sizing guide, use one for approximately 30–60 gallons, two for 60–120 gallons, or three for 120–180 gallons. Match the configuration to flow, bioload, active sock openings, and physical clearance; supported AIO installations may require an adapter.

Features

• High-density fleece advances automatically when clogged; connected extensions advance with the main controller.
• Cone-style fitting accommodates normal variation in most standard 4-inch filter sock holders.
• Sync mode supports single, dual, and triple filter configurations.
• The main controller supports water-level sensor operation and an experimental fixed-schedule timer mode.
• EasyThread loading simplifies fleece installation and replacement.
• Each filter includes one starter fleece roll.
• Designed for freshwater and marine environments.

Specifications

• Product type: Aquarium Filter
• Configurations: Main; Extension; Main + Extension Value Kit; Main + 2 Extensions Value Kit
• Maximum flow: Up to 800 GPH per filter; 1,600 GPH with two; 2,400 GPH with three
• General tank sizing: One filter: approximately 30–60 gal; two: 60–120 gal; three: 120–180 gal
• Minimum filter chamber clearance: 4.3 × 4.3 × 7 inches (109 × 109 × 180 mm)
• Filter footprint: 3.55 × 2.9 inches (90 × 73 mm)
• Height excluding fleece: 15.75 inches (400 mm)
• Installed height above sock plate: Approximately 10.6 inches (27 cm); allow additional installation and removal clearance
• Fleece roll size: 2.4 inches (61 mm) wide × 82 feet (25 m) long
• Typical fleece duration: 3–6 weeks depending on tank size, bioload, flow, and sensor height
• Extension equipment: Dual-link cable included; power adapter, controller, and sensor not included
• Main-unit power adapter: US plug; AC 100–240 V input; DC 12 V 2 A output; 5.5 × 2.1 mm barrel connector

Frequently Asked Questions

Can the Extension filter run on its own?

The Extension filter requires a main filter controller. It includes a dual-link cable but no power adapter, controller, or sensor; connected motors advance together when the main sensor triggers.

How many filter bodies should I use for my aquarium?

Use one filter for approximately 30–60 gallons, two for 60–120 gallons, or three for 120–180 gallons as a starting guide. Your final configuration should also account for system flow, bioload, and the number of active sock openings.

Will this roller filter fit my sump or AIO chamber?

The roller filter fits most standard 4-inch filter sock holders and supported AIO systems, with adapters required for some installations. Check the minimum 4.3 × 4.3 × 7-inch chamber clearance and allow approximately 10.6 inches above the sock plate plus extra room for installation and removal.

How often will I need to replace the fleece?

A fleece roll typically lasts 3–6 weeks, depending on tank size, bioload, flow, and sensor height. Each filter includes a starter roll measuring 2.4 inches wide and 82 feet long.

Can I use third-party replacement fleece?

Use the specified replacement fleece for this roller filter. Differences in roll dimensions and thickness can overload the motor, damage the motor or body, and void warranty coverage for resulting damage.

Can this filter be used in a saltwater aquarium?

This fleece roller filter is designed for both freshwater and marine environments. Choose the number of filter bodies according to your aquarium's flow, bioload, and available sock positions.