--- product_id: 541255634 title: "FZONE Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium" brand: "fzone" price: "€ 133.70" currency: EUR in_stock: true reviews_count: 13 category: "Fzone" url: https://www.desertcart.gr/products/541255634-fzone-aquarium-ato-with-controller-qst2-0-auto-top-off store_origin: GR region: Greece --- # 74 GPH micro pump flow 0.79 in optical sensor size QST 2.0 real-time safety FZONE Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium **Brand:** fzone **Price:** € 133.70 **Availability:** ✅ In Stock ## Summary > 💧 Keep your tank flawless—never miss a drop with FZONE’s smart ATO system! ## 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?** € 133.70 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/541255634-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 Shield:** QST 2.0 tech halts overfilling and alerts you instantly, protecting your aquatic ecosystem 24/7. - • **Plug & Play Convenience:** Complete kit with magnets, check valve, and 6-foot tubing for hassle-free installation and peace of mind. - • **Whisper-Quiet Efficiency:** 74 GPH micro pump delivers smooth, silent refills with optimized activation to extend pump life. - • **Compact Powerhouse Design:** Tiny 0.79-inch sensor fits rimmed, rimless, and sump tanks seamlessly without disrupting your sleek setup. - • **Effortless Water Level Mastery:** Auto top-off with precision dual optical sensors keeps your aquarium perfectly balanced—set it and forget it. ## Overview The FZONE Aquarium ATO with Controller QST2.0 is a compact, high-precision auto top-off system designed for both saltwater and freshwater tanks. Featuring dual optical sensors just 0.79 inches in diameter, it maintains water levels within 0.6 cm accuracy. Its quiet 74 GPH micro pump supports tanks with neck sizes over 1.97 inches and lifts water up to 2 meters. Enhanced safety features include real-time overfill protection and sensor fault detection. The system comes complete with installation accessories and offers a 2-year warranty with 24/7 customer support, making it a reliable, set-and-forget solution for busy aquarium enthusiasts. ## Description desertcart.com : FZONE Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium : Pet Supplies Review: Great little ATO - Great little ATO. It is really tiny! Easy to setup, comes with everything you need and it has been rock solid now for several weeks. I appreciate the one-click resume, when you res runs out of water, this beeps and turns red, click the button after filling up your res and it resumes normal operation. I have never had another ATO with this feature. Review: Another great FZone product! - 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 | #18,445 in Pet Supplies ( See Top 100 in Pet Supplies ) #45 in Aquarium Water Pumps | | Brand | FZONE | | Brand Name | FZONE | | Color | Blue2 | | Customer Reviews | 4.0 out of 5 stars 411 Reviews | | Flow Rate | 1.23 Gallons Per Minute | | Included Components | prevent backflow | | Item Dimensions L x W x H | 0.2"L x 0.1"W x 0.1"H | | Item Weight | 0.4 Kilograms | | Manufacturer | FZONE | | Manufacturer Part Number | ATO-580P | | Manufacturer Warranty Description | Manufacturer warranty for one year from date of purchase | | Material | Polypropylene (PP) | | Material Type | Polypropylene (PP) | | Maximum Lifting Height | 2 Meters | | Model Number | FZ-580P | | Power Source | Corded Electric | | Product Dimensions | 0.2"L x 0.1"W x 0.1"H | | Product Style | Auto | | Specific Uses For Product | Aquarium | | Style | Auto | | Unit Count | 1.0 Count | | Voltage | 15 Volts | ## Product Details - **Brand:** FZONE - **Color:** Blue2 - **Item Weight:** 0.4 Kilograms - **Material:** Polypropylene (PP) - **Maximum Flow Rate:** 1.23 Gallons Per Minute - **Maximum Lifting Height:** 2 Meters - **Power Source:** Corded Electric - **Product Dimensions:** 0.2"L x 0.1"W x 0.1"H - **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) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great little ATO *by D***B on June 18, 2026* Great little ATO. It is really tiny! Easy to setup, comes with everything you need and it has been rock solid now for several weeks. I appreciate the one-click resume, when you res runs out of water, this beeps and turns red, click the button after filling up your res and it resumes normal operation. I have never had another ATO with this feature. ### ⭐⭐⭐⭐⭐ Another great FZone product! *by A***R on December 12, 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! ### ⭐ Created a huge mess *by S***S on December 31, 2024* This seemed to be working fairly well until it went crazy and dumped 5 gallons of freshwater into my tank. That led to an overflow in the sump and I suddenly had a lake in my office. Fortunately the tank is new, so there were no corals or livestock in the tank. I will be going back to doing manual top offs. I recommend that you stay far away from this. ## 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.gr/products/541255634-fzone-aquarium-ato-with-controller-qst2-0-auto-top-off](https://www.desertcart.gr/products/541255634-fzone-aquarium-ato-with-controller-qst2-0-auto-top-off) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-07-07*