FZONE Aquarium ATO dual sensor front view showing real-time level monitoring
FZONE ATO compact footprint demonstrates space-saving installation
FZONE ATO pump delivering water for steady top-offs
FZONE ATO strong magnet mount securing the unit to glass
FZONE ATO check valve preventing backflow to protect the display
FZONE Aquarium ATO dual sensor front view showing real-time level monitoring
FZONE ATO compact footprint demonstrates space-saving installation
FZONE ATO pump delivering water for steady top-offs
FZONE ATO strong magnet mount securing the unit to glass
FZONE ATO check valve preventing backflow to protect the display

FZONE Aquarium ATO Auto Top Off System with Dual Optical Sensors – Reef & Freshwater Tanks (Blue)

Meet the FZONE Aquarium ATO Auto Top Off System Designed for compact spaces, this auto top off...
Availability: In stock
Product type: Filter Accessories
$56.41
$56.41
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FZONE Aquarium ATO dual sensor front view showing real-time level monitoring

FZONE Aquarium ATO Auto Top Off System with Dual Optical Sensors – Reef & Freshwater Tanks (Blue)

$56.41
FZONE Aquarium ATO dual sensor front view showing real-time level monitoring
FZONE ATO compact footprint demonstrates space-saving installation
FZONE ATO pump delivering water for steady top-offs
FZONE ATO strong magnet mount securing the unit to glass
FZONE ATO check valve preventing backflow to protect the display

FZONE Aquarium ATO Auto Top Off System with Dual Optical Sensors – Reef & Freshwater Tanks (Blue)

$56.41
Description
Description
x

Meet the FZONE Aquarium ATO Auto Top Off System

Designed for compact spaces, this auto top off system sits neatly in All-In-One tanks and bottom filtration sumps. With a nano footprint of just 0.7 inches, it blends into your sump area while delivering steady water levels. Real-time monitoring helps you maintain consistency without taking up precious tank space.

Key features that matter to you

  • Nano footprint: 0.7 inches, perfect for tight installations in All-In-One setups and bottom sumps.
  • Dual optical sensors: two 1 mm precision sensors watch the water level continuously, helping keep fluctuations under 0.6 cm.
  • Advanced reliability technology: EFTT (Extended-Filling-Time), AFT (Anti-Fluctuation), and QST 3.0 (Quick-Security Technology) work together to manage fill duration, prevent overfilling, and minimize unnecessary pump activity.
  • Comprehensive package: all accessories are included for a ready-to-use setup; strong magnets support glass up to 0.78 inches (20 mm).
  • Efficient water delivery: a 74 GPH pump can lift water up to 2 meters, ensuring reliable top-off to larger displays.
  • Safety and support: a check valve prevents backflow and a 2-year warranty plus 24/7 customer support provide peace of mind.

User-friendly design for real-life use

In everyday reef or freshwater environments, the ATO helps maintain stable salinity and water presence without constant manual adjustment. The compact form factor makes it feasible to place the unit discreetly in crowded sump areas, while the robust pump and secure mounting help reduce setup hassles.

What makes it convenient

  • All-in-one compatibility means fewer components to manage during routine maintenance.
  • Real-time alerts and smart fill timing reduce the likelihood of accidental overfill.
  • Durable construction and reliable sensors provide ongoing confidence for busy hobbyists.

FAQ

Q: Is the FZONE Aquarium ATO suitable for both reef and freshwater tanks?

A: Yes, its dual optical sensors monitor water level in real time and adapt to different tank setups.

Q: What technologies power the ATO's reliability?

A: EFTT, AFT, and QST 3.0 work together to manage fill time, prevent overfill, and minimize pump cycling.

Shipping & Return
Shipping & Return
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Shipping

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  • Orders are processed within 1–2 business days after payment confirmation; weekend and holiday orders are processed on the next business day.
  • Estimated delivery: 3–5 business days after dispatch in most U.S. locations; remote or limited-service areas may take longer.
  • Once your order ships, you receive a tracking link by email; tracking usually becomes active within 24–48 hours.

Returns

  • 30-day returns from the delivery date with a full refund for unused items in their original condition and packaging.
  • Free return shipping: email petlywox@gmail.com with your order number and we send you a prepaid return label.
  • Damaged, defective, expired or incorrect items are also returned free of charge for a full refund — please include photos.
  • Your refund is issued to the original payment method within 10 business days after we receive and inspect the return.
  • Opened food, treats or supplements, used grooming or hygiene items, custom products, sale items and gift cards are not returnable unless they arrived damaged, defective, expired or incorrect.

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Check the exact measurements and package contents before ordering. Read U.S. delivery details and return conditions. For a product question, email petlywox@gmail.com.

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