N-Clear M Manual

N-Clear M Fleece Roller Filter - User Manual
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Introduction

The N-Clear M Filter is a patent-pending automatic filter that 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.

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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 inch filter sock systems, with no modifications required.
  • Flexible Adapter Support: Compatible with a wide range of additional AIO tanks and sump systems through optional N-Fit adapters.
  • 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.
  • Dual-Mode Support: Allows two filters to operate synchronously using a single controller, ideal for multi-filter-sock sump setups.
  • Sensor-Based and Timer Modes: Supports sensor-based mode and an 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.
  • 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).
Note: The extension filter must be connected to a main filter. It does not include a power adapter, controller, or sensor. A dual-link cable is included.

How Automatic Filters Work
(Demonstration: N-Clear Nano)

Quick overview of the N-Clear M fleece roller filter in action.
  1. Water Intake: Flow from the aquarium enters the roll filter and is directed across the fleece.
  2. Filtration: Suspended debris is captured by the fleece while clean water exits the chamber.
  3. Sensor Detection: As debris accumulates, flow slows and the water level rises until the optical sensor is triggered.
  4. Automatic Advancement: The motor advances a fresh section of fleece, restoring flow and lowering the water level.
  5. Continuous Operation: The cycle repeats, providing uninterrupted mechanical filtration.

Quick Start Guide

N-Clear M arrives pre-installed. Simply plug and play.

Video upcoming soon.

Video upcoming soon.
Video upcoming soon.

Installation Instructions

Video upcoming soon.
Video upcoming soon.

Components Included

Component diagram placeholder
Component diagram coming soon.

Dual Mode Setup (Optional)

The N-Clear M Filter supports Dual Mode, allowing two filters to share the same controller and work together for tanks with dual filter chambers.

Use the included splitter cable to connect the motor of the secondary filter to the motor connector on the primary filter's controller.

Note: The secondary filter does not require a separate sensor.
Diagram illustrating two N-Clear M filters connected to a single controller in Dual Mode.
Dual-mode wiring showing two filters sharing one controller.

Controller Guide

Front view of the controller with labels for buttons and LED indicators.
Controller front panel with labeled buttons and indicator lights.

Buttons & Manual Controls

MODE Cycles through Default, Long Delay, and Timer Modes. Watch the MODE LED for off → blink → solid.
MANUAL Press and hold to advance the fleece motor. Use after maintenance to tighten the roll or check motor direction.
PAUSE
  • Press once → 30-minute pause (LED blinks).
  • Press twice → 12-hour pause (LED solid).
  • Press once while paused → Resume immediately.

Operating Modes

Default Mode

MODE LED: Off

Motor advances after the sensor stays submerged for about 30 seconds, then stops once it re-enters air.

Best for: Normal daily use when you prefer sensor-driven advances.
Long Delay Mode

MODE LED: Green (blinking)

Motor advances only after the sensor stays submerged for roughly 11 minutes, ignoring short pump-off events.

Best for: Systems where feeding pauses or maintenance often stop the return pump.
Timer Mode

MODE LED: Green (solid)

Timer Mode is experimental and runs the motor for 7.5 seconds every 12 hours regardless of sensor input. The actual amount of fleece advanced in each run depends on how much of the roll has already been used.

Important disclaimer: Timer Mode is an experimental feature provided for free. The actual amount of fleece advanced varies as the roll is used, and stability and performance are not guaranteed. This mode should only be used when sensor-based triggering is not possible, or when you have a special control requirement.

Best for: Rare situations where the sensor cannot reliably trigger an advance.

Recommendation: Sensor-triggered Default or Long Delay Modes remain the most efficient options. Only use Timer Mode when sensor triggering is not possible.

LED Indicators

LED State Meaning / Action
POWER On Controller has power and is ready.
Off No input power detected; verify the adapter connection.
MODE Off Meaning: Default Mode; sensor triggers a motor advance after ~30 seconds submerged.
Blinking Meaning: Long Delay Mode active.
Triggered by: Press MODE once from Default.
Reset: Press MODE again to return to Default.
Solid Meaning: Timer Mode is running an experimental 12-hour advance schedule, and the actual fleece length moved will vary as the roll wears down.
Triggered by: Press MODE twice from Default.
Reset: Press MODE again to cycle back to Default. Prefer Default or Long Delay whenever sensor triggering is possible.
ALARM Off System operating normally.
Blinking Meaning: Feeding pause.
Triggered by: Press PAUSE once.
Reset: Auto-resumes after 30 minutes or press PAUSE twice.
Solid Meaning: 12-hour maintenance pause.
Triggered by: Press PAUSE twice.
Reset: Auto-resumes after 12 hours or press PAUSE once to resume immediately.
Solid
and
beeping		 Meaning: Over-advancing alarm; the sensor stayed submerged too long.
Triggered by: Improper water level or sensor placement.
Reset: Adjust water level/sensor height, then press PAUSE once. Auto-resumes after 12 hours.

Additional Alerts

Motor or Circuit Fault

Alternating MODE and ALARM LEDs paired with rapid beeps indicate an electrical issue. Disconnect power and contact support.

Fleece Blockage or Depletion

Intermittent beeps with a blinking ALARM LED signal a clogged or empty roll. Replace the fleece and press PAUSE once.

No Controller Lights

If the controller does not power on, confirm the adapter connection or request a replacement from support.

Troubleshoot Steps

Use the guides below to resolve the most common issues.

Problem 1: Filter never advances

  • Make sure the filter is properly installed snugly, no too much wate bypassing.
  • Lower the sensor a little at a time until the fleece advances.
  • Check the sump water level and adjust if needed.
  • Inspect and clean the sensor.

Problem 2: Rolls too frequently or triggers alarms

Work through these steps in order:

  1. Verify connections: Reconnect the sensor, motor, and controller plugs. Ensure connections are secure.
  2. Reset the sensor height: Move the sensor to the highest position.
  3. Run for 24 hours, then assess:
    • Case 1: Fleece is dark/dirty and the filter never rolled. Lower the sensor gradually until it just touches the water and triggers a roll. The water level should drop immediately—leave the sensor there. This is the optimal sensor position
      All set!
    • Case 2: The filter rolled and the used fleece is dirty (yellow to brown). Keep the sensor at the top; that is the optimal sensor position.
      All set!
    • Case 3: The filter rolled but the fleece is nearly clean or almost used up. Repeat these steps carefully. If it still over-rolls, contact support.
      Needs attention
  4. Contact support if needed:

FAQ

How does the automatic roller work?

The N-Clear M Filter uses an optical water-level sensor to detect when the fleece becomes clogged. As debris restricts flow, water rises inside the chamber until it reaches the sensor. The controller then advances fresh fleece, restoring flow and water clarity.

Which aquariums are compatible?

The filter fits most 4" filter sock sumps and many popular AIO systems. If you are unsure about compatibility, reach out to support@naturedimensions.com for guidance.

How should the sensor behave?

  • Default Mode: Advances after the sensor stays submerged for about 30 seconds.
  • Long Delay Mode: Advances after the sensor stays submerged for roughly 11 minutes.

Raise the sensor if it triggers too frequently or the fleece still looks clean. Lower it slightly if it rarely triggers and waste accumulates; also verify pump flow is within the recommended range.

How often will the fleece advance?

Roll frequency varies by bioload, flow rate, and sensor height. It can advance every few hours or stretch beyond ten hours between cycles. Each 82-foot roll typically lasts 2–4 weeks and is designed for single use.

Why does my ATO react differently?

Expect slight water-level shifts between the display and rear chambers. Dirty fleece keeps more water in the display, while clean fleece lets more flow into the rear section. This behavior usually stabilizes within a day or two.

Safety Instructions

Read all instructions carefully before operating the N-Clear M Fleece Roller Filter. The device is for indoor use only, and the controller must not be exposed to water.

DANGER: To avoid electric shock, ensure the system is dry when connecting or disconnecting the power supply.

Important Safety Precautions

  • Do not use the device if the power cord, plug, or any component is damaged.
  • This product is suitable for users aged 14 and older, or younger users with supervision and guidance.
  • Keep the device out of reach of unsupervised children.
  • Only use the supplied power adapter.
  • Disconnect power before installation, removal, or cleaning.
  • Avoid pulling on the power cord when unplugging; grip the plug instead.

Technical Specifications

Supported Tanks

Fits most 30-120G tanks with minimum filter chamber clearance: 3.55" x 2.9" x 7.1" (90 mm x 73 mm x 180 mm)

  • 4" filter sock sump systems
  • 4" filter sock AIO systems
  • Other AIO systems (N-Fit adapter required)

We are actively adding more adapters. If you don't see an adapter for your tank, please submit a request. We will respond within 24 hours.
Max Flow Rate 800 GPH (main), up to 1600 GPH (main + extension)
Dual Filter Support Yes - one controller supports two filters running in sync; ideal for dual filter chambers or dual filter socks.
Filter Dimensions Footprint: 3.55" x 2.9" (90 mm x 73 mm)
Height (excluding fleece): 15.75" (400 mm)
Fleece Roll Dimensions Width: 2.4" (61 mm)
Length: 82 ft per roll
Fleece Roll Duration Typically 3-6 weeks per roll, depending on tank size, bioload, and flow rate
Operating Voltage 12V UL-certified power supply

Warranty

Product Warranty & Lifetime Support

Standard Warranty Coverage

We provide a one-year warranty covering the following N-Clear M components:

  • Feed shaft
  • Take-up shaft
  • Upper housing
  • Lower housing
  • Take-up motor
  • Sensor
  • Sensor bracket
  • Controller
  • Power adapter

Exclusions

The warranty does not cover damage resulting from:

  • Misuse, abuse, improper installation, or unauthorized modifications
  • Use of non-original or incompatible filter fleece rolls or accessories
  • Natural wear and tear or accidental damage
  • Repairs or servicing performed by anyone other than authorized service personnel

How to File a Warranty Claim

Email support@naturedimensions.com with:

  • Proof of purchase (order confirmation or invoice)
  • A clear description of the issue
  • Photos or video evidence, if available

Note: Nature Dimensions LLC reserves the right to deny claims that do not meet the above criteria.

Customer Support

Need help with setup or troubleshooting? We aim to respond within 24 business hours. Reach us here:

Limitation of Liability

  • Nature Dimensions LLC is not liable for indirect, incidental, or consequential damages caused by the use or inability to use this product.
  • The warranty is valid only in the country of purchase unless otherwise required by law.

Lifetime Warranty via Auto-Refill Subscription

N-Clear Auto-Refill keeps your fleece rolls stocked automatically and extends your device warranty for as long as your subscription remains active and eligible.

Benefits:

  • Automatic delivery on your schedule.
  • Enjoy a 20% discount on every roll.
  • Lifetime device warranty with an active subscription.

Eligibility:

  • Subscription must remain active for at least three consecutive months.
  • Your device must continue to meet standard warranty conditions.

Subscribe now at naturedimensions.com/products/auto-refill-n-clear-m-fleece-roll-2-pack.

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