--- product_id: 432283112 title: "ATO System for Saltwater Aquarium, Auto Top Off with Dual Optical Sensors for Reef and Freshwater Tanks (Green)" brand: "fzone" price: "¥13411" currency: JPY in_stock: true reviews_count: 13 category: "Fzone" url: https://www.desertcart.jp/products/432283112-ato-system-for-saltwater-aquarium-auto-top-off-with-dual store_origin: JP region: Japan --- # 0.7 inch nano compact size <1mm dual precision optical sensors 74 GPH pump lifts water 2m high ATO System for Saltwater Aquarium, Auto Top Off with Dual Optical Sensors for Reef and Freshwater Tanks (Green) **Brand:** fzone **Price:** ¥13411 **Availability:** ✅ In Stock ## Summary > 🌊 Keep your reef flawless with precision and peace of mind! ## Quick Answers - **What is this?** ATO System for Saltwater Aquarium, Auto Top Off with Dual Optical Sensors for Reef and Freshwater Tanks (Green) by fzone - **How much does it cost?** ¥13411 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/432283112-ato-system-for-saltwater-aquarium-auto-top-off-with-dual) ## 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 Filling Tech:** EFTT & AFT algorithms adapt fill time & prevent unnecessary pump activation, maximizing efficiency. - • **Ultra-Compact Design:** Fits seamlessly in rimmed or rimless tanks, perfect for sleek, space-conscious setups. - • **Robust & Reliable Pump:** Powerful 74 GPH pump with check valve ensures steady water delivery without backflow, even for large tanks. - • **Real-Time Safety Alerts:** QST 2.0 instantly notifies you of overfill risks or malfunctions, protecting your aquatic investment. - • **Precision Water Level Control:** Dual optical sensors maintain water fluctuation under 0.6 cm for reef-safe stability. ## Overview The FZONE ATO System is a cutting-edge auto top-off solution designed for both saltwater and freshwater aquariums. Featuring ultra-compact dimensions, dual <1mm optical sensors, and advanced technologies like EFTT, AFT, and QST 2.0, it guarantees precise water level maintenance with real-time safety alerts. Its powerful 74 GPH pump lifts water up to 2 meters, making it ideal for tanks of all sizes. Complete with strong magnets, check valve, and all necessary accessories, this system ensures hassle-free, efficient, and secure aquarium water management backed by 24/7 customer support. ## Description desertcart.com : FZONE ATO System for Saltwater Aquarium, Auto Top Off with Dual Optical Sensors for Reef and Freshwater Tanks (Green) : Pet Supplies Review: Super handy device that works quite well - I bought one to try out in a 15 gallon tank but I was very skeptical. I found it very easy to install and calibrate and it just plain works. It is quiet when running and, although the pump seems small, it is more than up to the task of moving water about 2 ft up from where the reservoir is and into the tank. I have since bought another for my other aquarium. If I were to be picky, I'd say that the LED in the sensor part is too bright for my taste but that is not enough of a gripe to even remove a star. I will be buying other Fzone products in the future! Review: Years of use with this easy to setup and inexpensive ATO. - Works well as an ATO on my rimless freshwater aquarium. Using an ATO is really essential for my rimless tanks which lose water to evaporation rapidly without keeping a lid on them. FZONE help center has improved over the years I’ve been a customer, they quickly responded to a pump issue outside of the warranty period. Good product and service for the price. ## 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 | #21,856 in Pet Supplies ( See Top 100 in Pet Supplies ) #91 in Aquarium Water Pumps | | Brand | FZONE | | Brand Name | FZONE | | Color | Green | | Customer Reviews | 3.9 out of 5 stars 967 Reviews | | Flow Rate | 1.23 Gallons Per Minute | | 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 Grams | | Manufacturer | FZONE | | Manufacturer Part Number | FZ-360P-DE | | Manufacturer Warranty Description | 1 | | Material | Plastic, Metal | | Material Type | Plastic, Metal | | Maximum Lifting Height | 2 Meters | | Model Number | FZ-360P | | Power Source | Electrical Cable | | Product Dimensions | 13.78"L x 7.87"W x 2.76"H | | Product Style | Classic | | Specific Uses For Product | Indoor | | Style | Classic | | UPC | 764595878146 | | Unit Count | 1.0 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 ![ATO System for Saltwater Aquarium, Auto Top Off with Dual Optical Sensors for Reef and Freshwater Tanks (Green) - Image 1](https://m.media-amazon.com/images/I/611y05gHH3L.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 ### ⭐⭐⭐⭐⭐ Super handy device that works quite well *by W***S on May 8, 2026* I bought one to try out in a 15 gallon tank but I was very skeptical. I found it very easy to install and calibrate and it just plain works. It is quiet when running and, although the pump seems small, it is more than up to the task of moving water about 2 ft up from where the reservoir is and into the tank. I have since bought another for my other aquarium. If I were to be picky, I'd say that the LED in the sensor part is too bright for my taste but that is not enough of a gripe to even remove a star. I will be buying other Fzone products in the future! ### ⭐⭐⭐⭐⭐ Years of use with this easy to setup and inexpensive ATO. *by C***G on March 4, 2026* Works well as an ATO on my rimless freshwater aquarium. Using an ATO is really essential for my rimless tanks which lose water to evaporation rapidly without keeping a lid on them. FZONE help center has improved over the years I’ve been a customer, they quickly responded to a pump issue outside of the warranty period. Good product and service for the price. ### ⭐ Don't buy motor don't work *by M***T on May 19, 2026* Got it in the mail hooked it up and the motor don't work and can't return it won't buy again just kp your bow you mite need it because I didn't so it's a loss ## 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) --- ## 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.jp/products/432283112-ato-system-for-saltwater-aquarium-auto-top-off-with-dual](https://www.desertcart.jp/products/432283112-ato-system-for-saltwater-aquarium-auto-top-off-with-dual) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-22*