Fzone ATO Auto Top Off Refilling System with Dual Optical Sensors

$62.00 $89.00


FZone smart ATO is a compact Auto Top Off system for all sizes of freshwater and marine aquariums. Combining the optical auto refilling sensor and an anti-overfilling sensor in one pack, along with integrated QST v2.0, ETFT, and AFT algorithm, the MT-360P precisely keeps the water level in right position and provides real-time protection against any failure and abnormality. Using FZone ATO to automatically replenish your water; maintaining a consistent salinity level better than manually and save you from this annoying chore.

Patented QST v2.

EFTT, & AFT Technologies Ensure Constant Water Level

The Fzone ATO will start filling below the "LOW" position & fill slightly higher than the "LOW" position. The "HIGH" position will prevent overfilling. The newest FZone ATO also has patented EFTT, AFT, & QTS technologies. These smart technologies allow the ATO device to work more safely compared to others on the marke


ETFT(Extra Time Filling Technology)

The FZone ATO recognizes the aquariums size by timing how long it takes to fill the water from “LOW” to “HIGH” position & caculates a a extra filling time called ETFT(Extra Time Filling Technology).

In normal working condition the device fills the water to the "LOW" position and will continue pumping for one extended filling time cycle until the water level reaches above “LOW” but never going above the “HIGH” position. The ETFT will precisely keep the water level between the "LOW" and the "HIGH" sensors.

This unique feature allows extra time of rest between refills, therefore it increases the product’s life span.

AFT (Anti-Fluctuation Technology)

Most ATO’s in the market start and stop the water pump too quickly due to the water level fluctuation caused by many factors. The frequent starting & stopping will shorten the pump’s life span and efficiency. Our smart ATO uses AFT to identify and recognize any false water fluctuation; it only starts the pump when the level is below "LOW".

QST (Quick Security Technology) v2.0

QST (Quick Security Technology) v2.0

The controller uses QST for real-time protection against overfilling and flooding. The controller will give a visual alert and stop the pump immediately when it senses a refilling time takes more than 6 times longer than the ETFT. QST can detect sensor malfunction or empty reservoir. In version 2.0 we incorporate ETFT feature and not relying on first filling time from version 1. Our ATO’s are far safer. Flooding barely happens when following the instructions carefully.


Built-in LED indicators to show working status!

Alternating red and blue: device is booting up/initializing.

Solid blue LED: Stand by.

Slow flashing blue LED: pump is refilling the water.

Fast flashing blue LED: Water lever reached HIGH sensor, anti-overfilling works. (After 10 seconds quick flash, the LED will become solid, no need to act)

RED LED flashing: QST 2.0 alarm. 6 times longer than ETFT (the time it takes to fill your tank, which is calculated during initialization, aka about 50% of the time it takes to fill from LOW sensor to HIGH sensor).


Power :AC 100-240V/50-60 Hz input, DC 12V/1A output.

Power cable length:6ft(180 cm)

Sensor precision:1mm

Pump head:8.2 feet (250 cm)

Pump flowrate:74 gph (280 lph) Max.

Mounting Thickness :15mm

Length of Cable between Sensor and Controller: 6 feet (150 cm)

Tubing:6feet(180cm), 7mm inner diameter.