Aqua Medic Refill System 2.0 Auto Top Off (ATO) with Safety Sensor & Alarm
£149.99
Smart & Safe Auto Top Off for Your Aquarium
The Aqua Medic Refill System 2.0 is a reliable and intelligent auto top off (ATO) system designed to maintain stable water levels in both marine and freshwater aquariums. Using a precision reed sensor with delay circuit, this system ensures accurate water level detection without false triggers caused by waves or surface movement.
Built with multiple safety features, it protects your aquarium and equipment while keeping salinity stable and maintenance minimal.
Key Features
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Automatic top-up of evaporated aquarium water
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Reed sensor with delay circuit (no false triggering from waves)
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Adjustable sensor holder for flexible installation
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Dry-run protection for refill pump
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Optical and acoustic alarms for added safety
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Low water level warning for refill reservoir
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Safety shutdown in case of sensor failure
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Plug-and-play connections with secure cable fittings
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Low voltage operation (12V) for added safety
Advanced Safety System
This ATO system is designed with multiple layers of protection:
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Prevents pump damage with dry-run protection
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Alerts you with visual and audible alarms
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Detects low water in the reservoir before issues occur
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Automatically shuts down if the sensor fails
Ideal for reef tanks where stability is critical
How It Works
The system continuously monitors your aquarium water level using a maintenance-free reed sensor. When water drops due to evaporation, the system automatically activates the refill pump to restore the correct level.
The built-in delay prevents unnecessary activation caused by water movement, ensuring accurate and stable operation.
Easy Installation
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Adjustable holder fits most sump and aquarium setups
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Simple plug connections for quick setup
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Secure cable fittings prevent accidental disconnection
Designed for both beginners and experienced reefers
Power & Specifications
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12V low voltage system (safe for aquarium use)
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Transformer included (100–240V / 50–60Hz)
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Suitable for most standard ATO pumps
Frequently Asked Questions (AEO)
What is an auto top off system (ATO)?
An ATO system automatically replaces evaporated water in your aquarium, helping maintain stable salinity and water levels.
How does the reed sensor work?
The reed sensor detects water level changes and includes a delay circuit to prevent false triggers caused by waves or surface movement.
Does this system have safety features?
Yes — it includes:
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Dry-run protection
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Low water alerts
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Optical and acoustic alarms
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Automatic safety shutdown
Is it easy to install?
Yes, the system features plug-and-play connections and an adjustable holder for quick setup in most aquariums.
Can this be used in reef tanks?
Absolutely — it’s ideal for reef tanks where maintaining stable salinity is essential.




