---
product_id: 619153697
title: "FZONE Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium"
brand: "fzone"
price: "27458 kr"
currency: ISK
in_stock: true
reviews_count: 5
category: "Fzone"
url: https://www.desertcart.is/products/619153697-fzone-aquarium-ato-with-controller-qst2-0-auto-top-off
store_origin: IS
region: Iceland
---

# 74 GPH micro pump flow 0.79 in optical sensor diameter QST 2.0 real-time overfill protection FZONE Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium

**Brand:** fzone
**Price:** 27458 kr
**Availability:** ✅ In Stock

## Summary

> 💦 Never let evaporation win—automate your aquarium’s hydration like a pro!

## Quick Answers

- **What is this?** FZONE Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium by fzone
- **How much does it cost?** 27458 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/619153697-fzone-aquarium-ato-with-controller-qst2-0-auto-top-off)

## 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

- • **Smart Safety Assurance:** QST 2.0 tech halts refilling and alarms if overfill or sensor faults occur—peace of mind guaranteed.
- • **Compact & Versatile Fit:** Slim 0.79-inch sensor fits rimmed, rimless, and sump tanks with ease, adapting to wave fluctuations under 1 cm.
- • **Complete Ready-to-Install Kit:** Includes strong magnets, check valve, and 6-foot tubing for hassle-free setup—start protecting your aquarium today.
- • **Precision Water Level Control:** Dual optical sensors maintain water level within 0.6 cm for flawless tank balance.
- • **Whisper-Quiet Pump Performance:** 74 GPH micro pump operates silently with optimized cycles to extend lifespan.

## Overview

The FZONE Aquarium ATO with Controller QST2.0 is a cutting-edge automatic top-off system designed for both saltwater and freshwater tanks. Featuring dual optical sensors with 0.79-inch diameter, it maintains water levels within 0.6 cm precision. Its whisper-quiet 74 GPH micro pump supports up to 2 meters lift height, ensuring efficient refills. Enhanced with QST 2.0 technology, it offers real-time overfill protection and sensor fault detection. The compact design fits various tank types, and the complete accessory kit enables quick installation. Backed by a 2-year warranty and 24/7 support, it’s the ultimate solution for stress-free aquarium maintenance.

## Description

Evaporation is every tank owner’s constant enemy. Auto top off systems are a crucial piece of any fish tank. FZONE Automatic Top-Off (ATO) systems provide convenient assurances. The products use water from a reservoir to refill tank or sump levels. This helps maintain specific gravity and salinity. In particular, this is important in reef and marine tanks. Drops in these levels increase stress on fish and can be fatal.

Review: Avendo in casa diverse vasche nel periodo estivo mi trovo a dover rabboccare l'acqua evaporata, se la vasca è piccola ci si sta dietro ma quando questa è grande diventa un vero problema. Per tale scopo ho acquistato questo sistema di rabbocco automatico, l'ho testato appena arrivato simulando una evaporazione minima e devo dire che dopo che l'acqua è scesa di pochi millimetri, il sistema ha attivato la pompa per ristabilire il corretto livello, ho ripetuto diverse volte questa prova e il sensore è sempre intervenuto in modo preciso. La pompa l'ho immersa in una tanica da 20 litri essendo piccola per mia fortuna è passata dal foro del tappo, la pompa riesce a spingere l'acqua tranquillamente nella vasca nonostante sia a livello pavimento. Nella confezione c'è tutto il necessario all'installazione, non manca proprio nulla, quindi che dire il prodotto è perfetto, completo e allo stesso tempo funziona bene. Dimenticavo lo utilizzo anche per i cambi settimanali d'acqua così non porto più su le taniche e fa tutto lui in automatico e la mia schiena ringrazia.
Review: Perfect ATO System - Set It and Forget It! The FZONE Aquarium ATO with Controller has been one of the best upgrades I’ve made to my tank. Setup was incredibly straightforward, and the controller feels solid, accurate, and reliable. The optical sensor detects water levels perfectly, and the pump tops off smoothly without any noise or delay. I love that I no longer have to worry about daily evaporation and my water level stays stable, and my fish are happier than ever. The safety features give great peace of mind, and the build quality is way better than I expected for the price. If you’re looking for a dependable, hassle-free automatic top-off system, the FZONE ATO is absolutely worth it. 100% recommend!

## Features

- Upgraded 2.0 ATO System：The 2.0 ATO system ensures efficient daily water level maintenance for saltwater and freshwater tanks, making it ideal for use during trips or holidays. The upgraded interface allows you to easily start, pause, or resume the system with the FZ button
- Compact and Versatile Design：The optical sensor measures just 0.79 inches in diameter, making it suitable for rimmed, rimless, or sump tanks. Dual sensors, spaced 0.1 cm apart, monitor water levels with precision, maintaining a difference of only 0.6 cm. Recommended for tanks with wave fluctuations under 1 cm.
- Enhanced Safety Features：QST 2.0 technology provides real-time overfill protection. The system stops the pump and triggers an alarm if refilling exceeds 3 times the preset limit. It also detects sensor issues and low reservoir levels for added safety.
- Quiet Micro Pump：The compact pump fits tanks with neck sizes over 1.97 inches, offering a flow rate of 74 gallons per hour and a lift height of up to 2 meters. Optimized operation reduces unnecessary activations, extending pump life.
- Complete Accessories Included：The set includes strong magnets (compatible with tank walls up to 0.78 inches thick), a check valve to prevent backflow, and a 6-foot (180 cm) tube for quick installation.
- 2-Year Warranty & 24/7 Customer Support:FZONE provides a comprehensive 2-year warranty along with 24/7 online customer support. If you have any questions or encounter any issues with your product, our team is always available to assist you—anytime, anywhere.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C68N3WK9 |
| Best Sellers Rank | #20,566 in Pet Supplies ( See Top 100 in Pet Supplies ) #218 in Water Pumps (Pet Supplies) |
| Brand | FZONE |
| Colour | Blue2 |
| Generic Name | ATO |
| Included Components | prevent backflow |
| Item Weight | 400 g |
| Item model number | FZ-580P |
| Manufacturer | FZONE |
| Material | Polypropylene (PP) |
| Maximum Flow Rate | 1.23 Gallons Per Minute |
| Maximum Lifting Height | 2 Metres |
| Net Quantity | 1.0 Count |
| Power Source | Corded Electric |
| Product Dimensions | 5L x 3W x 3H Millimeters |
| Specific Uses For Product | Inside |
| Style | Auto |
| Voltage | 15 Volts |

## Product Details

- **Brand:** FZONE
- **Colour:** Blue2
- **Item Weight:** 0.4 Kilograms
- **Material:** Polypropylene (PP)
- **Maximum Flow Rate:** 1.23 Gallons Per Minute
- **Maximum Lifting Height:** 2 Metres
- **Power Source:** Corded Electric
- **Product Dimensions:** 5L x 3W x 3H Millimeters
- **Style:** Auto
- **Voltage:** 15 Volts

## Images

![FZONE Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium - Image 1](https://m.media-amazon.com/images/I/51LdVhZJ0ML.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***A on 25 November 2023*

Avendo in casa diverse vasche nel periodo estivo mi trovo a dover rabboccare l'acqua evaporata, se la vasca è piccola ci si sta dietro ma quando questa è grande diventa un vero problema. Per tale scopo ho acquistato questo sistema di rabbocco automatico, l'ho testato appena arrivato simulando una evaporazione minima e devo dire che dopo che l'acqua è scesa di pochi millimetri, il sistema ha attivato la pompa per ristabilire il corretto livello, ho ripetuto diverse volte questa prova e il sensore è sempre intervenuto in modo preciso. La pompa l'ho immersa in una tanica da 20 litri essendo piccola per mia fortuna è passata dal foro del tappo, la pompa riesce a spingere l'acqua tranquillamente nella vasca nonostante sia a livello pavimento. Nella confezione c'è tutto il necessario all'installazione, non manca proprio nulla, quindi che dire il prodotto è perfetto, completo e allo stesso tempo funziona bene. Dimenticavo lo utilizzo anche per i cambi settimanali d'acqua così non porto più su le taniche e fa tutto lui in automatico e la mia schiena ringrazia.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 12 December 2025*

Perfect ATO System - Set It and Forget It! The FZONE Aquarium ATO with Controller has been one of the best upgrades I’ve made to my tank. Setup was incredibly straightforward, and the controller feels solid, accurate, and reliable. The optical sensor detects water levels perfectly, and the pump tops off smoothly without any noise or delay. I love that I no longer have to worry about daily evaporation and my water level stays stable, and my fish are happier than ever. The safety features give great peace of mind, and the build quality is way better than I expected for the price. If you’re looking for a dependable, hassle-free automatic top-off system, the FZONE ATO is absolutely worth it. 100% recommend!

### ⭐⭐⭐⭐⭐ Review
*by R***D on 17 January 2026*

Great product with useful features. Easy to install and works very well. The low resovior water warning light is a great touch.

## Frequently Bought Together

- FZONE ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium
- PAIZOO Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish, Axolotl, Turtle or Aquatic

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.is/products/619153697-fzone-aquarium-ato-with-controller-qst2-0-auto-top-off](https://www.desertcart.is/products/619153697-fzone-aquarium-ato-with-controller-qst2-0-auto-top-off)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-17*