Frequently Asked Questions

1. How It Works

The N-Clear Nano Filter uses an optical water-level sensor to detect clogging of the fleece media. When debris blocks water flow, the water level rises. Once it reaches the sensor, the motor activates and rolls fresh fleece, restoring flow and clarity.

2. Installation & Setup

Sensor Adjustment Tutorial:

  1. Check the initial water level in the filter case. The ideal level should be ~1/2 inch below the emergency overflow opening. Adjust the water level by adding or removing water, adjusting the return pump, or repositioning the water-level baffle (e.g., in UNS tanks).
  2. Position the sensor slightly above the emergency overflow opening. This is a good starting point.
  3. If the filter triggers too often or the fleece still looks white, raise the sensor slightly.
  4. If it rarely triggers or never rolls, lower the sensor slightly. Also check your pump. For a 15G tank, at least 150 GPH is recommended.

3. Compatibility & Adapters

Please refer to our product page for the latest list of supported AIO tanks.

If your tank is under 30 gallons but not listed, feel free to contact us — we’re constantly adding new adapters.

4. Sensor Behavior

Normal Mode: Rolls for 1–2 seconds until water drops below the sensor. Best for maintaining stable water levels.

High-Efficiency Mode: Rolls for ~7 seconds per trigger. Removes waste faster but may cause more fluctuation.

Sensor Adjustment Tip:

  • Raise the sensor if it triggers too often (fleece still looks clean or alarm goes off).
  • Lower the sensor if it rarely triggers. Also ensure your return pump is strong enough.

5. Fleece Roll Usage

Roll Frequency: Varies by tank bioload, flow rate, and sensor height. In high-bioload tanks, it may roll every few hours. In very clean tanks, it may take 10+ hours between rolls.

Replacement Interval: Every 2–4 weeks. Each roll is 82 ft and designed for single use.

6. ATO Behavior

The filter may cause slight water level shifts between the display and rear chambers:

  • Dirty fleece: More water stays in the display section.
  • Clean fleece: More water shifts into the rear chamber.

This behavior is normal and usually stabilizes within 1–2 days. For best ATO stability, use Normal Mode.