Nature Dimensions N-Fill Smart Auto Top Off System
SKU: 4853118255

Nature Dimensions N-Fill Smart Auto Top Off System

Sale price$47.25 Regular price$52.50
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Nature Dimensions N-Fill Smart Auto Top Off SystemAffordable & Reliable Auto Top Off System Redundant, Dual Float Sensors Smart Over Fill Protection Built In Intuitive Controller w Status Indicator LEDs Ideal for Nano to Mid Size Tanks Safe for Freshwater or Saltwater Aquariums The N Fill Auto Top Off (ATO) is a simple, affordable system built specifically for nano to mid size aquariums. Using dual float sensors and smart overfill protection, it automatically replaces evaporated water with fresh RO

Affordable & Reliable Auto Top Off System

  • Redundant, Dual Float Sensors
  • Smart Over-Fill Protection Built-In
  • Intuitive Controller w/ Status Indicator LEDs
  • Ideal for Nano to Mid-Size Tanks
  • Safe for Freshwater or Saltwater Aquariums

 

The N-Fill Auto Top Off (ATO) is a simple, affordable system built specifically for nano to mid-size aquariums. Using dual float sensors and smart overfill protection, it automatically replaces evaporated water with fresh RO/DI so your tank's salinity stays stable day after day. The compact controller, clear status LEDs, and easy setup make it approachable for beginner hobbyists, while still being an ATO experienced reefkeepers can trust. By keeping the water level consistent, the N-Fill helps to reduce stress on fish and corals, improve overall tank stability, and eliminate the need for daily manual top-offs.

Dual Float Sensors

Two independent float switches monitor the same water line. The controller starts a refill whenever either sensor detects low water. Even if one sensor fails, the other still triggers top-offs. This redundancy helps prevent missed refills and provides an extra layer of stability compared to most ATOs on the market.

Smart Overfill Protection

If the pump runs for more than about 90 seconds, the controller pauses filling and triggers an audible alarm with a red status LED. This fail-safe helps prevent overfilling if a float sticks low, flow is restricted, or the reservoir behaves unexpectedly.

Simple On-Board Control Buttons

  • Manual: Hold to run the pump for priming or quick refills, release to stop.
  • Pause: Press once for a 30-minute pause. Ideal for feeding or light maintenance.
  • Stop: Press once to disable automatic filling during major maintenance. Resumes after 24 hours.

LED Status Indicators

  • Power: Controller has power and is ready.
  • Filling: ATO pump is actively running.
  • Status: Off during normal operation, blinking when paused, and solid red during stop mode or overfill alarm

 

Specifications

  • Power Input: AC 100–240 V, 50/60 Hz
  • Power Output: DC 12V 1A, UL Listed Adapter
  • Maximum Pump Head: 160 cm | 63"
  • Maximum Flow Rate: 180 L/h | 47.6 GPH
  • Maximum Glass Thickness: Up to 15 mm | 0.6"
  • Sensor Adjustment Range: Up to 10 cm | 4" Below Tank Rim
  • Tank Compatibility: Freshwater and Saltwater Aquariums
  • Control Modes: Manual Fill, 30-Minute Pause, 24-Hour Stop
  • Over-Fill Protection: Auto Timeout After ~90 Seconds with Alarm and Status LED
  • LED Indicators: Power, Filling, Status

What's Included?

N-Fill Controller

Dual Float Sensors with Adjustable Holder

N-Neon ATO Tubing Organizer

Submersible DC Pump

Water Tubing (2 M | 6.5 ft)

Siphon Breaker Connector with Cover

UL Listed 12V 1A Power Adapter

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 4853118255

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4.1 ★★★★★
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Cali Mom
Bozeman, US
★★★★★ 5
Perfect size, high quality
Size: 7.7" x 7.7" x 1.7", Color: Black (Metal Silvered)
I had a previous catch all tray that I bought on amazon, it used buttons on the 4 corners to turn a flat cardboard into a tray. Over time, the catch all tray got filled up, not just with a wallet, keys and eyeglasses but eventually business cards and other knick knacks. With all the items inside the tray, sometimes the buttons would start to pop out. It wasn't awful, more of an annoyance. But it was time for me to find a more durable tray. I looked on amazon and added 6 different trays that had "potential" into my shopping cart. Then I carefully evaluated each one and deleted them out of my cart until there was only one left. Some had multiple compartments. Some were larger than this one. I felt the ones with compartments would limit my ability to put the things I want in there. Also, I didn't want it so big that it took up too much desk space. Ultimately, I felt this was the perfect size. I'm extremely happy with it, the quality is really nice and it looks and feels durable. No more loose buttons and spilled knick knacks.
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Reviewed in the United States on October 14, 2024
D
Verified Purchase
Denise
Charlottesville, US
★★★★★ 5
Keeps clutter away
Size: 7.7" x 7.7" x 1.7", Color: Black (Metal Silvered)
This works great to corral all my notes I write on post its or small notes. Keeping them hidden from the desk top b/c or the depth but still visible to me. Much better than keeping on the plotter. Looks great in quality .
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 25, 2025
M
Verified Purchase
MovieGuy
Phoenix, US
★★★★★ 5
Attractive, Simple, And Well-Made
Size: 7.7" x 7.7" x 1.7", Color: Orange (Metal Glided)
I use this as a "catchall". A place to stash things like my wallet and keys when I enter the door, so that I don't use them (I had been prone to that!). It serves it's purpose well. It's both sturdy and attractive, and a good size for a "catchall". Recommended for those like me who need such things.
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Reviewed in the United States on April 8, 2024
K
Verified Purchase
Kirstin Gramith
Phoenix, US
★★★★★ 4
Good quality, orange color
Size: 7.7" x 7.7" x 1.7", Color: Orange (Metal Glided), Size: 7.7" x 7.7" x 1.7", Color: Orange (Metal Glided)
The quality is surprisingly good but the color is much more orange toned in person.
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Reviewed in the United States on April 17, 2024
K
Verified Purchase
kenneth
Waukegan, US
★★★★★ 5
Holder
Size: 7.7" x 7.7" x 1.7", Color: Black (Metal Silvered)
It’s great for my keys and wallet and other stuff I use it every day
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 30, 2025

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