N-Clear M Fleece Roller Filter (30–120 Gallons)

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$219.99 USD

~~$219.99 USD~~ $219.99 USD

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Option Main Extension Main + Extension Value Kit Main + 2 Extensions Value Kit

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M Fleece Roll, 2-Pack (FDA Food-Grade)

$21.99

One-time purchase
$19.79/each for 3+ rolls

Subscribe & Lifetime Warranty

$17.59

Monthly or quarterly delivery
Lifetime warranty for your filter

Free over $59.99 $4.99 economy | $9.99 expedited | $29.99 express
1-year warranty + 6-month extension Buy direct from Nature Dimensions

This patent-pending automatic filter fits most 4" filter sock sumps and many popular AIO systems. This automated, high-efficiency filtration system helps keep your water crystal clear with minimal effort. Free N-Neon 3D fluorescent stickers included.

Key Features

Automatic Roller Filtration
High-density fleece advances automatically when clogged, providing continuous mechanical filtration with no manual intervention.
Industry-Leading Compatibility
Patent-pending fitting system designed to work with most 4" filter sock systems, with no modifications required.
Flexible Adapter Support
With N-Fit M adapters, also compatible with many systems with filter chamber openings larger than 4.3" × 4.3":
- 7" × 4.5" rectangular filter sock systems
- Many AIO systems
- See the full list in the table below
High Flow Rate
Rated at 800 GPH in single mode or up to 1600 GPH in dual mode, suitable for tanks up to 120 gallons.
Supports Sync Mode
Supports up to 4 filters running in sync with one controller, ideal for multi-filter-sock sump setups.
Sensor-Based and Timer Modes
Supports sensor-based mode and experimental timer mode.
Sensor-based mode advances fleece in response to real water level changes.
Experimental timer mode advances fleece on a fixed schedule without sensor input.
Plug and Play
Fully pre-assembled out of the box. Simply plug in a few connectors and start running within minutes.
EasyThread Fleece Installation
Innovative EasyThread installation method enables fast, clean fleece loading with minimal handling, making replacement simple and frustration-free.
Freshwater and Saltwater Ready
Designed for reliable operation in both freshwater and marine environments.
FDA Food-Grade Fleece Rolls
First in the industry. The fleece is made from food-grade material and independently tested by a certified third-party lab to meet U.S. FDA food-contact standards (21 CFR 177.1630).

Main vs Extension

The extension unit does not include a power adapter, controller, or sensor. A dual-link cable is included. It must be connected to a main filter controller to run in Sync mode, and all connected motors advance together when the main sensor triggers. Sync mode supports up to 4 filters running together on one controller. A multi-filter setup is highly recommended for tanks with multiple filter chambers, especially tanks above 60 gallons. As a general guideline, we recommend 1 unit per 40 - 60 gallons of tank volume.

For unused openings, you can use the N-Fit Filter Sock Cover to block water flow through the opening.

User Manual

Click here to learn more about the details.

Warranty: 1-year limited warranty. Buy direct from Nature Dimensions to receive an additional 6-month warranty extension, for 18 months of total coverage. View warranty policy.

⚠ Fleece Roll WarningPlease do not use third-party fleece rolls. Differences in roll length, width, and thickness can place significantly different loads on the motor. Improper rolls can damage the motor and body, and any resulting damage will void the warranty.

⚠ Notice for Non-US CustomersAll units only come with US power adapter.
AC 100-240 V input, DC 12 V 2 A output.
You can replace it with an adapter that matches the same voltage, with the same or higher amperage rating, and the plug shape needed for your country.

Technical Specifications

Supported Tanks	Fits most 30–120G tanks with minimum filter chamber clearance: 4.3" × 4.3" x 7" (109 mm × 109 mm × 180 mm) Confirmed fit examples: Sump systems: Red Sea sumps, Innovative Marine RFS sumps, Eshopps Mariner sumps (N-Fit M adapter needed), and most other 4" filter sock systems. All-in-one systems: Innovative Marine 30/40/50 AIO (N-Fit M adapter needed), Innovative Marine SR 60–120 AIO, Waterbox 65.4 AIO, Waterbox 50 Peninsula, and JBJ RF25–65. For other AIO systems above 30 gallons, please reach out at support@naturedimensions.com if your tank or adapter is not listed. We’re constantly expanding our adapter lineup to support more tank models.
Max Flow Rate	800 GPH (main), up to 1600 GPH (main + extension)
Dual Filter Support	Yes — Sync mode supports up to 4 filters running in sync on one controller.
Filter Dimensions	Footprint: 3.55" × 2.9" (90 mm × 73 mm) Height (excluding fleece): 15.75" (400 mm) Minimum required clearance above the filter sock plate: 4" × 3.5" x 9.8" (102 mm × 90 mm × 250 mm). Please make sure there are no cables, pipes, or valves interfering with the clearance above the filter sock opening within this required space.
Fleece Roll Dimensions	Width: 2.4" (61 mm) Length: 82 ft per roll
Fleece Roll Duration	Fleece rolls typically last 3-6 weeks, depending on tank size, bioload, flow, and sensor height. Each N-Clear filter includes 1 starter fleece roll.
Cable Lengths	Sensor, motor, and power adapter cables are each about 150 cm / 60 in
Operating Voltage	12V UL-certified power supply