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 Aug 16 - Aug 21

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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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Joe Watanabe
Draper, US
★★★★★ 5
It works and is well priced.
This mouse works as well as much higher-priced brand-name items. It fits well in the hand. The durability is very good. Considering the price compared to other brand names, this is a very good value.
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Reviewed in the United States on May 27, 2026
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Mark H. in the Garage
San Leandro, US
★★★★★ 4
Solid Everyday Mouse with a Few Comfort Trade-Offs
I’ve been using this Amazon Basics 2.4 GHz wireless optical mouse as a simple, no-frills option, and overall it does exactly what it’s supposed to do. Setup was instant with the USB nano receiver, tracking is accurate, and the wireless connection has been reliable with no dropouts or lag during daily use. It’s lightweight and works well for general browsing and office tasks. Where it falls a bit short for me is ergonomics. Compared to my Logitech mouse, this one doesn’t feel quite as natural or contoured in the hand during longer sessions. It’s by no means uncomfortable, just not as refined in terms of hand fit. That said, for the price and simplicity, it’s a dependable mouse that gets the job done. A solid choice if you want something basic and reliable.
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Reviewed in the United States on January 10, 2026
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Hardy
Port Orchard, US
★★★★★ 5
Love it
I’m honestly impressed with this mouse. The Wireless Optical Mouse works exactly as it should—simple, reliable, and smooth. Setup was instant, just plug in the USB receiver and it’s ready to go. No lag or connectivity issues at all. The tracking is precise, and it feels comfortable even after long use. The battery life is solid, and I like that it goes into sleep mode to save power. It’s lightweight but still feels well-built, not cheap. For the price, this is a great value. If you need a dependable wireless mouse without overpaying for unnecessary features, this is a perfect choice.
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Reviewed in the United States on April 24, 2026
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Gutale
Natrona Heights, US
★★★★★ 5
Amazon basics mouse
Good mouse with hight quality. Works like a charm. I recommend for anyone looking for a cheap high quality Amazon basics mouse. You wont regret it.
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Reviewed in the United States on June 6, 2026
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Mustangjim1
Los Angeles, US
★★★★★ 5
Awesome quality mouse
Fantastic value. First it feels like a quality mouse and works like a mouse 3-4x the price. It is solid and has nice weight to it, not like some of the flimsy competitors. I am buying another just to have.
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Reviewed in the United States on May 26, 2026

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