--- product_id: 541255634 title: "Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium" brand: "fzone" price: "€ 130.96" currency: EUR in_stock: true reviews_count: 13 category: "Fzone" url: https://www.desertcart.gr/products/541255634-aquarium-ato-with-controller-qst2-0-auto-top-off-system store_origin: GR region: Greece --- # 74 GPH ultra-quiet pump 0.79 in optical sensor precision QST 2.0 real-time overfill safety Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium **Brand:** fzone **Price:** € 130.96 **Availability:** ✅ In Stock ## Summary > 💦 Keep your tank flawless, even when life calls you away! ## Quick Answers - **What is this?** Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium by fzone - **How much does it cost?** € 130.96 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-aquarium-ato-with-controller-qst2-0-auto-top-off-system) ## 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 - • **Whisper-Quiet Pump Power:** 74 gallons per hour flow with a 2-meter lift height, engineered for silent, efficient operation that extends pump life. - • **Smart Safety, Zero Worries:** Advanced QST 2.0 tech halts overfilling and alerts you instantly, protecting your aquatic ecosystem 24/7. - • **Compact Sensor, Big Accuracy:** Tiny 0.79-inch optical sensor fits any tank style, delivering pinpoint water level monitoring with just 0.6 cm variance. - • **Effortless Water Level Mastery:** Set it and forget it—precise auto top-off keeps your aquarium perfectly balanced, even when you're away. - • **Plug & Play with Premium Accessories:** Includes strong magnets, check valve, and 6-foot tubing for fast, hassle-free installation and reliable performance. ## Overview The FZONE Aquarium ATO with Controller QST2.0 is a cutting-edge auto top-off system designed for both saltwater and freshwater tanks. Featuring a compact optical sensor for ultra-precise water level detection, a whisper-quiet 74 GPH pump with 2-meter lift, and advanced QST 2.0 safety technology to prevent overfill and sensor errors. Complete with premium installation accessories and backed by a 2-year warranty plus 24/7 support, it’s the ultimate hassle-free solution for maintaining stable aquarium water levels—perfect for busy professionals who demand reliability and peace of mind. ## Description desertcart.com : FZONE Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium : Pet Supplies 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! Review: Great to use for my backup fish tank reservoir - I travel and really don't trust anyone to keep up with my salter water aquarium and the reservoir to keep my auto top off full. I purchased this use in my backup reservoir in hopes of it keeping my main reservoir full at all times, for at least 6 days. It worked like a charm! I'm so glad I got this, and especially for the money! ! It's quiet, and simple to set up. If it is empty, the red light comes on to turn off the pump. When you're ready to fill it again, you just push the red button, and the pump turns back on. Easy! ## 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 | #21,649 in Pet Supplies ( See Top 100 in Pet Supplies ) #57 in Aquarium Water Pumps | | Brand Name | FZONE | | Color | Blue2 | | Customer Reviews | 4.2 4.2 out of 5 stars (372) | | 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 Warranty Description | Manufacturer warranty for one year from date of purchase | | Material Type | Polypropylene (PP) | | Maximum Lifting Height | 2 Meters | | Model Number | FZ-580P | | Power Source | Corded Electric | | Product 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 ![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 ### ⭐⭐⭐⭐⭐ 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! ### ⭐⭐⭐⭐⭐ Great to use for my backup fish tank reservoir *by S***R on January 28, 2026* I travel and really don't trust anyone to keep up with my salter water aquarium and the reservoir to keep my auto top off full. I purchased this use in my backup reservoir in hopes of it keeping my main reservoir full at all times, for at least 6 days. It worked like a charm! I'm so glad I got this, and especially for the money! ! It's quiet, and simple to set up. If it is empty, the red light comes on to turn off the pump. When you're ready to fill it again, you just push the red button, and the pump turns back on. Easy! ### ⭐⭐⭐⭐⭐ GREAT PRODUCT, SUPERB CUSTOMER SERVICE!!! *by A***S on April 22, 2025* I’ve been using the FZONE ATO with QST2.0 Controller for a few months, which has completely streamlined my tank maintenance routine. Right out of the box, I was impressed by the build quality — sturdy components, well-packaged, and clear instructions. Setup was a breeze. It took under 20 minutes to install and calibrate everything. The QST2.0 controller is the real star here. It’s smart, responsive, and offers a level of precision that gives me total peace of mind. The sensor is extremely accurate and doesn’t require constant tweaking like some cheaper models I’ve used in the past. I particularly appreciate the fail-safe features — if something goes wrong (like the reservoir running dry), the system alerts you and shuts off automatically to prevent any disasters. I’ve noticed a significant improvement in the stability of my tank's salinity and water levels since installing this ATO. It's super quiet during operation, and the included tubing and bracket are both high quality and easy to position just right. I had an issue months later with the sensor accuracy, contacted Customer Service and they replace the part immediately! Thanks Cheryl! If you're on the fence, don't hesitate — the FZONE is worth every penny. Highly recommend! ## 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-aquarium-ato-with-controller-qst2-0-auto-top-off-system](https://www.desertcart.gr/products/541255634-aquarium-ato-with-controller-qst2-0-auto-top-off-system) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-04-25*