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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Ryan
Boise, US
★★★★★ 5
Great shoes
Size: 6 Toddler, Color: Brown
Perfect for little ones
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Reviewed in the United States on May 28, 2026
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Mimie Hull
Omaha, US
★★★★★ 5
Great kids sandals
Size: 9 Toddler, Color: Taupe
These are cute and my kids say they’re comfortable! We got a few colors. Definitely would purchase again. They’ve got good quality.
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Reviewed in the United States on March 18, 2026
J
Verified Purchase
Jenna Smeyne
Lexington, US
★★★★★ 1
Super wide
Size: 13 Little Kid, Color: Taupe
They are oddly very wide. Great for kids with wide chunky feet but for us it was not cute
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Reviewed in the United States on May 18, 2026
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Verified Purchase
Kindle Customer
Omaha, US
★★★★★ 2
Nice but runs small
Size: 7 Big Kid, Color: Navy
The sandals are nice and not to hard or flimsy but they are cut very small.
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Reviewed in the United States on April 22, 2026
A
Alexandria Knox
West Palm Beach, US
★★★★★ 4
Solid Kids Sandals, Overpriced Like Most Kids Shoes 🌞
Size: 11 Little Kid, Color: Brown, Size: 11 Little Kid, Color: Brown
My son hasn’t worn these yet since it’s December in Indiana and sandals + snow obviously don’t mix. 😂 So this review is based on first impressions rather than long term wear. That said, these seem wider than a lot of typical kids’ sandals, which I REALLY appreciate since we tend to have wider feet in our family. #hobbitfeet The quality feels pretty decent overall. They’re described as lightweight, and while they’re not insanely lightweight, they do have enough weight to feel semi-sturdy and not flimsy or cheap. I like the style and color, and I think they’ll work well for my son once warmer weather hits. My main complaint is the price. At just under $24 at the time of this review, it feels a little high for kids’ sandals and for what these are. I really feel like $20 MAX would make more sense. Kids shoes are almost always priced like adult shoes, even though they clearly use less material, and that’s hard for me to understand and wrap my mind around. Overall, these seem solid for daily wear, I just wish the price was a bit more reasonable and affordable.
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Reviewed in the United States on December 31, 2025

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