--- product_id: 541255634 title: "FZONE Aquarium ATO System, QST2.0 Auto Top Off Controller for Tanks" brand: "fzone" price: "AR$243478" currency: ARS in_stock: true reviews_count: 13 category: "Fzone" url: https://www.desertcart.com.ar/products/541255634-fzone-aquarium-ato-system-qst2-0-auto-top-off-controller store_origin: AR region: Argentina --- # 74 GPH micro pump flow rate 0.79 in optical sensor diameter QST 2.0 real-time overfill protection FZONE Aquarium ATO System, QST2.0 Auto Top Off Controller for Tanks **Brand:** fzone **Price:** AR$243478 **Availability:** ✅ In Stock ## Summary > 💧 Keep your aquarium flawless—automate with precision and style! ## Quick Answers - **What is this?** FZONE Aquarium ATO System, QST2.0 Auto Top Off Controller for Tanks by fzone - **How much does it cost?** AR$243478 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/541255634-fzone-aquarium-ato-system-qst2-0-auto-top-off-controller) ## 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 First:** QST 2.0 tech halts overfilling and alerts you instantly, protecting your aquatic ecosystem 24/7. - • **Compact & Versatile Fit:** Slim 0.79-inch sensor fits rimmed, rimless, and sump tanks—perfect for any modern aquarium setup. - • **Plug & Play Convenience:** Complete kit with magnets, check valve, and 6-foot tubing for effortless installation and peace of mind. - • **Precision Water Level Control:** Dual optical sensors maintain water level within 0.6 cm for flawless aquarium balance. - • **Ultra-Quiet, High-Performance Pump:** 74 gallons per hour flow with a 2-meter lift height ensures efficient, whisper-quiet operation. ## Overview The FZONE Aquarium ATO QST2.0 Auto Top Off System is a cutting-edge solution for maintaining optimal water levels in both saltwater and freshwater tanks. Featuring dual optical sensors for precise monitoring, a quiet 74 GPH micro pump, and advanced overfill protection technology, it ensures your aquatic environment stays stable and safe. Compact design and included accessories make installation seamless, backed by a 2-year warranty and 24/7 support for worry-free ownership. ## Description desertcart.com : FZONE Aquarium ATO with Controller, QST2.0 Auto Top Off System for Saltwater Aquarium & Freshwater Aquarium : Pet Supplies Review: A Simple Upgrade That Makes a Big Difference - I can honestly say this ATO system has exceeded my expectations. I didn’t realize how much I needed an automatic top-off system until I installed this one. One of my favorite features is the sleek external controller. It gives me clear status indicators and easy controls without adding unnecessary lights or clutter inside the aquarium, keeping the display clean and distraction-free. Installation was quick and straightforward. For a cleaner, more finished appearance, I drilled a 3/8-inch hole in the back of my standby water reservoir to route both the water tubing and the DC pump cable. The result looks professional and keeps everything neatly hidden. Best of all, no more water lines from fluctuating water levels and no more manually topping off the tank every day. It’s one of those upgrades that quietly makes aquarium maintenance much easier. Thanks for a great product, FZONE! 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. It is very quiet while operating and I also 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. Full tank shot of my 120 gallon soon to be planted (just finished cycling) and sump where you can see just how small the sensor is (bottom right) and controller is (top middle w/ inkbird temp controller next to it for size comparison) ## 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 | #22,626 in Pet Supplies ( See Top 100 in Pet Supplies ) #48 in Aquarium Water Pumps | | Brand | FZONE | | Brand Name | FZONE | | Color | Blue2 | | Customer Reviews | 3.9 out of 5 stars 435 Reviews | | Flow Rate | 1.23 gpm | | 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 kg | | 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 | | Number of Items | 1 | | 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 Count | | Voltage | 15 volts | ## Product Details - **Brand:** FZONE - **Color:** Blue2 - **Item Weight:** 0.4 kg - **Material:** Polypropylene (PP) - **Maximum Flow Rate:** 1.23 gpm - **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 System, QST2.0 Auto Top Off Controller for Tanks - Image 1](https://m.media-amazon.com/images/I/51LdVhZJ0ML.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ A Simple Upgrade That Makes a Big Difference *by A***R on July 20, 2026* I can honestly say this ATO system has exceeded my expectations. I didn’t realize how much I needed an automatic top-off system until I installed this one. One of my favorite features is the sleek external controller. It gives me clear status indicators and easy controls without adding unnecessary lights or clutter inside the aquarium, keeping the display clean and distraction-free. Installation was quick and straightforward. For a cleaner, more finished appearance, I drilled a 3/8-inch hole in the back of my standby water reservoir to route both the water tubing and the DC pump cable. The result looks professional and keeps everything neatly hidden. Best of all, no more water lines from fluctuating water levels and no more manually topping off the tank every day. It’s one of those upgrades that quietly makes aquarium maintenance much easier. Thanks for a great product, FZONE! ### ⭐⭐⭐⭐⭐ 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. It is very quiet while operating and I also 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. Full tank shot of my 120 gallon soon to be planted (just finished cycling) and sump where you can see just how small the sensor is (bottom right) and controller is (top middle w/ inkbird temp controller next to it for size comparison) ### ⭐ Don’t buy *by K***U on May 17, 2026* Absolutely horrible. I was wary to purchase this and I should have trust my instincts. Within two weeks it dumped the entire reservoir into the tank dropping salinity (fortunately did not lose any animals). It went into alarm status when the reservoir was emptied. Also lucky that it did not overflow the tank as the reservoir had maybe half a gallon. I should have sucked it up and bought a tunze. ## 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.com.ar/products/541255634-fzone-aquarium-ato-system-qst2-0-auto-top-off-controller](https://www.desertcart.com.ar/products/541255634-fzone-aquarium-ato-system-qst2-0-auto-top-off-controller) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-09-11*