Best Auto Top Off For Reef Tank – Buying Guide

1MagTool Optical Sensor AUTO TOP Off(ATO) with Upgraded QST Tech ... Top Pick

MagTool Optical Sensor AUTO TOP Off(ATO) with Upgraded QST Tech …

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2hygger Mini Intelligent Auto Top Off System with Controller Magnetic ... Best Quality

hygger Mini Intelligent Auto Top Off System with Controller Magnetic …

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32.5 Gallon Auto Top Off Container for Aquarium Reef Tank ... Recommended

2.5 Gallon Auto Top Off Container for Aquarium Reef Tank …

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4Kamoer ATO One SE Smart Automatic top Off System Silent ...

Kamoer ATO One SE Smart Automatic top Off System Silent …

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5Himarine Smart Auto Aqua ATO kit Automatic Top Off System ...

Himarine Smart Auto Aqua ATO kit Automatic Top Off System …

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6EPTTECH Aquarium Marine Reef Fish Tank Automatic Auto Top Off ...

EPTTECH Aquarium Marine Reef Fish Tank Automatic Auto Top Off …

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7IceCap Dual Optical ATO - Auto Top Off Controller

IceCap Dual Optical ATO – Auto Top Off Controller

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8XP Aqua Ultimate ATO - Complete 4-Sensor Aquarium Auto-Top-Off System

XP Aqua Ultimate ATO – Complete 4-Sensor Aquarium Auto-Top-Off System

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9DIGITEN Auto Top Off System Aquarium ATO Water Filler System ...

DIGITEN Auto Top Off System Aquarium ATO Water Filler System …

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10Clscea Aquarium Auto Top Off System Water Filler Compensator Blue

Clscea Aquarium Auto Top Off System Water Filler Compensator Blue

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Review of Best Auto Top Off For Reef Tank

Top Pick

MagTool Optical Sensor AUTO TOP Off(ATO) with Upgraded QST Tech ...

1. MagTool Optical Sensor AUTO TOP Off(ATO) with Upgraded QST Tech …

  • Brand: MagTool
  • Manufacturer: MagTool

Features

  • Compact size – the entire optical sensor unit ONLY 0.8 inches diameter. The unit works on rimmed and rimless tanks, and as well as sump tanks. The dual precision optical sensors are 0.1 cm apart, which enables it to monitor the level fluctuation precisely (less than 0.6cm difference)
  • New and Improved Features – Upgraded ETFT (Extra Time Filling Technology), AFT (Anti-fluctuation Technology), and QST 2.0 (Quick Security Technology). With all these new upgrades combined, our ATOs are far superior and safer. ETFT recognizes your tank size after it first initialized. Working alongside the ETFT, the AFT will be able to decide how long it takes to refill your tank without over-filling it when the QST alarm is triggered.
  • QST 2.0 provides real-time protection against overfilling and pump dry run.  The controller will give a visual alert and stop the pump immediately when it senses a refilling time more than 6 times longer than the time calculated by ETFT.  QST can detect a malfunction of the sensor/controller or even an empty reservoir.In version 2.0 we incorporate ETFT feature and not relying on first filling time from version 1. Flooding barely happens when following the instructions carefully.
  • Everything you need is included in the package. Powerful magnet supports 15mm thick glass wall. Check valve prevents water from back flowing from the tank. Hose holder allows you easily secure the tubing. Powerful 70gph water pump can lift water up to 2.5 m high.
  • WARRANTY – 1 year free warranty covers ATO controller, refilling pump, power adapter.

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Best Quality

hygger Mini Intelligent Auto Top Off System with Controller Magnetic ...

2. hygger Mini Intelligent Auto Top Off System with Controller Magnetic …

  • Brand: hygger
  • Manufacturer: hygger

Features

  • 【How does it Work】Automatic top off system with 2 optical sensors monitors and replenishes evaporated water each day. A great time and energy saver for saltwater tank fish keeper especially when you are not at home.
  • 【Fail-Safe Design】build in two set of sensors, hygger auto top off keeps track of the water line of aquarium/sump tank. ATO monitoring sensor which keep a constant watch on the water level in your tank, and when it drops below a certain level and the water pump will be activated to automatically refill the tank. While the external sensor monitors reservoir’s water level to ensure the water pump not running dry as a result of water drying out.
  • 【Overfill Protection】Use a top probe to sense the high water level, the ATO sensor alerts with flashing led light and beeping sound if there is any malfunctioning with the device itself, auto shut off the water pump when the water level exceeds the desired maximum top off level. It to be used in both marine and freshwater aquariums up to 60 gallon.
  • 【Enable Drain Out Water】 Comes with a mini DC-powered water pump and a soft hose which can effectively pumps water from bucket/jug with a head height of up to 2 meters. Vice versa. It can also drain dirty water out of the tank. Flow rate: 74gph.
  • 【Packing Include】 1 x ATO monitor sensor; 1 x external sensor; 1 x water pump; 1 x 5.9 ft soft hose; 1 x hose holder; 1 x user manual. A read-to-go kit out of box, it is easily installed via a magnetic mounting which can be used on tank glass up to 1/2” (12mm) thickness.

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Recommended

2.5 Gallon Auto Top Off Container for Aquarium Reef Tank ...

3. 2.5 Gallon Auto Top Off Container for Aquarium Reef Tank …

  • Brand: Marine Color
  • Manufacturer: MARINE COLOR
  • Color: Clear

Features

  • 2.5 Gallon Auto Top Off Container for Aquarium Reef Tank reservoir
  • crystal clear PC with an elegant top, to hold top off water for your aquarium in a closed container.
  • The Trigger Systems ATO containers have a removable lid to prevent excess evaporation, while providing a large opening to refill and clean the reservoir as needed.
  • Each ATO reservoir has two 0.25” OD holes for tubes to be plumbed through, or wires for float switches.
  • Can be used as dosing conteiner.

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Kamoer ATO One SE Smart Automatic top Off System Silent ...

4. Kamoer ATO One SE Smart Automatic top Off System Silent …

  • Brand: K KAMOER
  • Manufacturer: Kamoer Fluid Tech (Shanghai) Co., Ltd.

Features

  • Kamoer ATO one se automatic water replenisher, a good helper for the fish tank at home!It has the function of adding water overtime alarm to prevent water level overflow caused by sensor failure.
  • This ATO is equipped with S1 float sensor, also called anti-overflow sensor (to prevent excessive water replenishment and water overflow) and S2 optical sensor (also called water replenishment sensor). Usually note: In the case of ATO running normally, S1 is not working, and the float state is sinking. S2 works.(Sensors may fail if not properly installed, make sure they are properly installed (or unplugged and reinstalled).)
  • In daily use, S2 is a sensor that detects the lowest water level. The function of S1 is to cause the float to rise when the water level exceeds the S2 optical sensor and reaches the S2 float sensor when S2 fails (for example, foam is generated in the sea tank, etc.) Alarm, stop refilling.
  • Please install the sensor correctly (the main picture has a picture description), otherwise the product will not work. And the distance between the two sensors is not less than 10cm. The height difference between the make-up bucket and the sump/master tank should not exceed 1.5 meters, and the liquid level of the make-up bucket should not be higher than the liquid level of the sump/master tank.
  • Some problems mentioned in product reviews: such as quality assurance, installation problems, and product failure to work, etc., please watch the demo video and detailed introduction on the details page. We give a detailed explanation on the details page.

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Himarine Smart Auto Aqua ATO kit Automatic Top Off System ...

5. Himarine Smart Auto Aqua ATO kit Automatic Top Off System …

  • Brand: Himarine
  • Manufacturer: Himarine
  • Color: Multicolor

Features

  • Extremely compact design, simple and beautiful, the best choice for aqurium
  • Dual-optical level sensor in one pack provides dual protection, Multiple sensors are combined into a single probe, including a back up sensor inside, which automatically switches when the main detector fails
  • Quick Security Technology provides real-time failsafe protection against failure
  • Included Sensor protective cover, Blocking debris
  • Multicolor LED light alert

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EPTTECH Aquarium Marine Reef Fish Tank Automatic Auto Top Off ...

6. EPTTECH Aquarium Marine Reef Fish Tank Automatic Auto Top Off …

  • Brand: EPTTECH
  • Manufacturer: EPTTECHNOLOGY

Features

  • Package:Includes ATO Controller,Pump,90-250VAC Power Supply,1.8meters hose,hose holder and user manual;
  • Advantage:1.No cable in the fish tank 2.Magnetic installation
  • Function:Keep the water in almost the same level of the tank
  • Max tank thickness:12.5mm

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IceCap Dual Optical ATO - Auto Top Off Controller

7. IceCap Dual Optical ATO – Auto Top Off Controller

  • Brand: IceCap
  • Manufacturer: IceCap
  • Dimensions: Weight: 1.95 Pounds `

Features

  • Optical sensor may not operate properly in aquariums with high turbidity

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XP Aqua Ultimate ATO - Complete 4-Sensor Aquarium Auto-Top-Off System

8. XP Aqua Ultimate ATO – Complete 4-Sensor Aquarium Auto-Top-Off System

  • Brand: XP Aqua
  • Manufacturer: XP Aqua
  • Dimensions: Height: 8.1 Inches Width: 2.8 Inches Length: 10.1 Inches

Features

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DIGITEN Auto Top Off System Aquarium ATO Water Filler System ...

9. DIGITEN Auto Top Off System Aquarium ATO Water Filler System …

  • Brand: DIGITEN
  • Manufacturer: DIGITEN

Features

  • 🐠【Easy to Install】The aquarium auto top off system is extremely to install and maintain. Easily install on terrarium with a wall thickness of no more than 5/8 inches (16 mm). The range from the top of the tank to the water level is 0-6.7 inches (0-17 cm). The durable PC material adjustable bracket can be fixed in the terrarium according to different water levels.
  • 🌿【Integrated Design Without Setting】Plug and play, easy operation. Anti-overflow protection design and will automatically cut off power when water level is too high.
  • 💧【Double Protection】Accurate dual-float water level sensor can provide over-filling protection. When the water level drops below the lowest water level, the power supply will be activated and the water pump will work automatically and shut down when the water level reaches the highest water level. When the first float fails, the second float will work.
  • 🐚【Relay Control】The controller of the ato system integrates a relay and a stable circuit to protect the water pump and the water level switch more effectively.
  • 🦐【Widely Applications】It is widely used in various aquariums, sump, fish tanks, coral reef tanks, etc. Rest assured your product is covered by one-year warranty.

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Clscea Aquarium Auto Top Off System Water Filler Compensator Blue

10. Clscea Aquarium Auto Top Off System Water Filler Compensator Blue

  • Brand: Clscea
  • Manufacturer: Clscea
  • Color: Blue

Features

  • Great for nano tanks, use with the principle of differential pressure to automatically refill water, simple and practical. You need to prepare 0.5-1.5L (16.9-50.7 FL Oz) plastic water bottles such as EVAIN / Coca Cola / Fiji yourself.
  • Built-in noise reduction device can effectively reduce noise. (Note: not completely silent).
  • Screw-free, no damage to the tanks. Made of corrosion-resistant ABS material, which is also usable in saltwater. The length of the tubing (manually cut) allows you to adjust the water level.
  • Suitable for tanks with 3-10mm /0.12-0.39in wall thickness. Note: Incompatible with rimmed tanks and curved fish tanks; and tanks with 3mm/0.12in or 5mm/0.2in thickness wall need to use the self-adhesive gasket (included).
  • A reliable gadget during business trips or travel. Compatible with fish tank, tortoise tank, planted aquarium, saltwater aquarium, etc. For tanks longer than 40cm/16inch, it is recommended to use 2 refillers together.

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