---
product_id: 432283112
title: "FZONE ATO System, Auto Top Off with Dual Optical Sensors for Aquarium Green"
brand: "fzone"
price: "$102.27"
currency: USD
in_stock: true
reviews_count: 13
category: "Fzone"
url: https://www.desertcart.us/products/432283112-fzone-ato-system-auto-top-off-with-dual-optical-sensors
store_origin: US
region: United States of America
---

# <1mm dual optical sensors 0.7 inch nano size 74 GPH pump, 2m lift FZONE ATO System, Auto Top Off with Dual Optical Sensors for Aquarium Green

**Brand:** fzone
**Price:** $102.27
**Availability:** ✅ In Stock

## Summary

> 💧 Stay effortlessly flawless: The smartest auto top-off your aquarium deserves!

## Quick Answers

- **What is this?** FZONE ATO System, Auto Top Off with Dual Optical Sensors for Aquarium Green by fzone
- **How much does it cost?** $102.27 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/432283112-fzone-ato-system-auto-top-off-with-dual-optical-sensors)

## Best For

- fzone enthusiasts

## Why This Product

- Trusted fzone brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Nano Design:** Sleek 0.7-inch profile fits rimmed, rimless tanks & sumps without clutter.
- • **Real-Time Safety Alerts:** Upgraded QST 2.0 instantly stops overfilling & dry runs, protecting your aquatic ecosystem.
- • **Powerful & Reliable Pump:** 74 gallons/hour capacity with 2-meter lift supports even large reef or saltwater tanks.
- • **Smart Filling Algorithms:** EFTT & AFT tech tailor fill times & prevent unnecessary pump cycles for efficiency.
- • **Precision Dual Optical Sensors:** Sub-millimeter accuracy (<1mm) ensures water level fluctuations stay under 0.6 cm.

## Overview

The FZONE ATO System is a cutting-edge auto top-off solution featuring ultra-compact design and dual precision optical sensors that maintain water levels within 0.6 cm. Equipped with advanced EFTT, AFT, and QST 2.0 technologies, it intelligently adapts to your aquarium size, prevents overfilling, and protects pumps from dry running. Its 74 GPH pump with 2-meter lift capacity ensures reliable water delivery for tanks up to 74 gallons. Ideal for both freshwater and saltwater setups, this system includes all accessories and strong magnets for easy installation on various aquarium types, backed by responsive 24/7 customer support.

## Description

desertcart.com : FZONE ATO System, Auto Top Off with Dual Optical Sensors for Aquarium Green | Dual optical sensor ATO system for reef and freshwater tanks, with precise water level control and stable operation : Pet Supplies

Review: Exactly what I expected - Flow is very strong and setup was a breeze. The sensor itself is very small so it doesn’t take up much space visually. Just make sure to use the included check valve so your tank doesn’t drain from the tube.
Review: Great customer service from a team that cares about their product - Very affordable and easy setup. Wonderful customer service! They quickly diagnosed a small issue I was having and sent replacement parts out within a day. Would definitely recommend this product to hobbyists!

## Features

- Small in size; install in a compact space, install in both rimed & rimless aquariums or sumps. This aquarium auto top off is nano at only 0.7 inches and works as an auto top off system saltwater aquarium.
- Includes <1mm dual precision optical sensors, watches the water level in real time, ensures the aquariums water fluctuation is less than 0.6 centimeters. This aquarium ato ensures precise and stable performance.
- New technologies that allow the ATO to be more reliable; EFTT (Extened-Filling-Time Technology), AFT (Anti-fluctuation Technology) techology, & upgraded QST 2.0 (Quick-Security Technology). EFTT can recognize your aquariums size & will dertimine how long it takes to fill to the desired level. QST alerts you in real-time when the ato is finished & prevents over filling. AFT measures the water level & ensures the ATO doesn't activate the pump unnecessarily, making this an efficient ato auto top off system.
- QST 2.0 provides real-time protection against overfilling & won't allow the pump to run dry. The ATO controller will give a visual alert & stop the pump immediately when it senses a refilling time more than 6 times longer than the time calcualted by EFTT. QST will detect malfunctions of the sensor, controller or if you have a empty reservoir. Version 2.0 includes new technology making our ATO’s the most safe option among aquarium auto top off systems.
- All accessories included in the package. Strong magnets can support aquarium wall thickness up to 0.78 inches (20mm). Check valve prevents backflow & will not drain your main display. 74 gallon per hour water pump will lift water up to 2 meters ensuring water delivery to even the biggest aquariums, ideal for an auto top off system saltwater aquarium.
- Customer Service Team：Fzone will offer a round-the-clock service, and you can reach out to us at any time for any aquarium ato related concerns.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09YVP3L22 |
| Best Sellers Rank | #19,166 in Pet Supplies ( See Top 100 in Pet Supplies ) #64 in Aquarium Water Pumps |
| Brand | FZONE |
| Brand Name | FZONE |
| Color | Green |
| Customer Reviews | 3.9 out of 5 stars 1,008 Reviews |
| Flow Rate | 1.23 gpm |
| Included Components | Water Pump, Dual Sensing Optical Probe, Check Valve, Hose Holder, Powerful Magnet, Upgraded QST Technology, Intelligent ETFT Algorithm |
| Item Dimensions L x W x H | 13.78"L x 7.87"W x 2.76"H |
| Item Type Name | water refill |
| Item Weight | 63 g |
| Manufacturer | FZONE |
| Manufacturer Part Number | FZ-360P-DE |
| Manufacturer Warranty Description | 1 |
| Material | Plastic |
| Material Type | Plastic |
| Maximum Lifting Height | 2 meters |
| Model Number | FZ-360P |
| Number of Items | 1 |
| Number of Packs | 1 |
| Power Source | Electrical Cable |
| Product Dimensions | 13.78"L x 7.87"W x 2.76"H |
| Product Style | aquarium auto top off system |
| Specific Uses For Product | auto top off system saltwater aquarium |
| Style | aquarium auto top off system |
| UPC | 764595878146 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** FZONE
- **Color:** Green
- **Item Weight:** 63 Grams
- **Material:** Plastic, Metal
- **Maximum Flow Rate:** 1.23 Gallons Per Minute
- **Maximum Lifting Height:** 2 Meters
- **Number of Packs:** 1
- **Power Source:** Electrical Cable
- **Product Dimensions:** 13.78"L x 7.87"W x 2.76"H
- **Style:** Classic

## Images

![FZONE ATO System, Auto Top Off with Dual Optical Sensors for Aquarium Green - Image 1](https://m.media-amazon.com/images/I/611y05gHH3L.jpg)
![FZONE ATO System, Auto Top Off with Dual Optical Sensors for Aquarium Green - Image 2](https://m.media-amazon.com/images/I/41g6zq9bgpL.jpg)
![FZONE ATO System, Auto Top Off with Dual Optical Sensors for Aquarium Green - Image 3](https://m.media-amazon.com/images/I/51fQ+3j-ntL.jpg)
![FZONE ATO System, Auto Top Off with Dual Optical Sensors for Aquarium Green - Image 4](https://m.media-amazon.com/images/I/51ho0cIIuXL.jpg)
![FZONE ATO System, Auto Top Off with Dual Optical Sensors for Aquarium Green - Image 5](https://m.media-amazon.com/images/I/41zmNAzFcPL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Any time the pump looses power and reboots when it gets power back does it have to refill all the way to top line for measurement? Or is it a one time**
A: Yes it has to refill to the top sensor so it can recycle, also if water level goes way below sensor when it reboots it will only pump 3 times then red light comes back on so unplug and plug back in so it can pump remainder water to reach level you might have to do this several times( i hope not) usually once is sufficient, hope this helps.

**Q: Can I use it on a 40 gal ?**
A: Yes, it will work fine.

**Q: Will this still work if I put a longer tube on it?**
A: Sure

**Q: How do you install hose clamp on a rimmed tank?**
A: Just rotate it. It will fit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Exactly what I expected
*by W***N on July 30, 2026*

Flow is very strong and setup was a breeze. The sensor itself is very small so it doesn’t take up much space visually. Just make sure to use the included check valve so your tank doesn’t drain from the tube.

### ⭐⭐⭐⭐⭐ Great customer service from a team that cares about their product
*by N***I on July 23, 2026*

Very affordable and easy setup. Wonderful customer service! They quickly diagnosed a small issue I was having and sent replacement parts out within a day. Would definitely recommend this product to hobbyists!

### ⭐ Great product
*by M***N on November 1, 2025*

I purchased this for my nano reef tank and it works well. Simple setup. I wish in a future or maybe an upgraded model that a second sensor to monitor the top off containers water level could be included so that the pump does not run dry. UPDATE I have been running this since my purchase and I have woken up to water on the floor again. Do not buy this unless you want ruined floors, cabinets, etc.. For saltwater fish or reef tanks it is unacceptable as the water is either to high or to low. I have other ATO and this is not acceptable.

## Frequently Bought Together

- Fzone Aquarium ATO Auto Top Off Refilling System with Dual Optical Sensor for Both Reef and Fresh Tank （360P)
- Seachem Reef Glue Cyanoacrylate Gel Coral Frag Mounting, 20g (001167)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-25*