Telephone: 1 450-669-9256
Email: sales@reefsolution.com
Auto Top Off Osmolator
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Float valve 
Float valve
$19.95Float valve
$19.95 -
Tunze Metering pump 
Tunze Metering pump
$41.99Tunze Metering pump
$41.99 -
Kamoer ATO One SE V2 
Kamoer ATO One SE V2
$114.95Kamoer ATO One SE V2
$114.95 -
Electronic RO Water Controller 8555 
Electronic RO Water Controller 8555
$332.95Electronic RO Water Controller 8555
$332.95 -
Red Sea ReefCan - Compact and Functional ATO Reservoir 
Red Sea ReefCan - Compact and Functional ATO Reservoir
$139.99Red Sea ReefCan - Compact and Functional ATO Reservoir
$139.99 -
Red Sea ReefATO+ System – Intelligent Water Level Management 
Red Sea ReefATO+ System – Intelligent Water Level Management
$369.99Red Sea ReefATO+ System – Intelligent Water Level Management
$369.99 -
Kamoer ATO One RO V2 
Kamoer ATO One RO V2
$114.95Kamoer ATO One RO V2
$114.95 -
Red Sea ReefATO+ Reefer Upgrade Kit – Smart Water Level Control 
Red Sea ReefATO+ Reefer Upgrade Kit – Smart Water Level Control
$329.99Red Sea ReefATO+ Reefer Upgrade Kit – Smart Water Level Control
$329.99 -
Osmolator 3, 3154 - automatic filling 
Osmolator 3, 3154 - automatic filling
$325.95Osmolator 3, 3154 - automatic filling
$325.95 -
Red Sea ATO Float Valve for Max E/S and Reefer 
Red Sea ATO Float Valve for Max E/S and Reefer
$33.95Red Sea ATO Float Valve for Max E/S and Reefer
$33.95 -
Tunze Osmolator 3 NANO 3151 - Auto top off 
Tunze Osmolator 3 NANO 3151 - Auto top off
$209.99Tunze Osmolator 3 NANO 3151 - Auto top off
$209.99 -
Red Sea ReefATO+ ATO Sensor 
Red Sea ReefATO+ ATO Sensor
$69.99Red Sea ReefATO+ ATO Sensor
$69.99 -
AutoAqua Smart Temp Security 
AutoAqua Smart Temp Security
$80.99AutoAqua Smart Temp Security
$80.99 -
AutoAqua Smart Skimmer Security – Skimmer Overflow Prevention System 
AutoAqua Smart Skimmer Security – Skimmer Overflow Prevention System
$64.79AutoAqua Smart Skimmer Security – Skimmer Overflow Prevention System
$64.79 -
AutoAqua Smart Level Security – Intelligent Safety System for Aquariums 
AutoAqua Smart Level Security – Intelligent Safety System for Aquariums
$80.99AutoAqua Smart Level Security – Intelligent Safety System for Aquariums
$80.99 -
AutoAqua Smart ATO RO – Automatic Refill System for RO Reservoirs 
AutoAqua Smart ATO RO – Automatic Refill System for RO Reservoirs
$244.99AutoAqua Smart ATO RO – Automatic Refill System for RO Reservoirs
$244.99
Automatic Top Off Systems for Reef Aquariums
Maintain the perfect water level in your marine aquarium with our auto top-off systems (ATO osmolators). These automated systems compensate for evaporation, preserve salinity, and ensure stable parameters for your reef tank.
Complete Auto Top Off Solutions
- Complete Auto Top Off Kits – Ready-to-install systems with pump, sensors and reservoir
- ATO Pumps – Reliable metering pumps for automatic filling
- Top-Off Tanks – Storage Containers for RO/DI Water
- DIY Components – Build Your Own Custom Top-Off Auto System
Why Use an Auto Top Off System?
Evaporation in reef aquariums causes salinity spikes that stress corals and fish. An automatic osmolator adds fresh water to maintain constant levels, protecting your animals and reducing maintenance.
Best Osmolator Brands
We offer the best ATO systems from Tunze, Red Sea, Kamoer and AutoAqua – trusted brands for reef aquarists in Canada, known for their reliability and accuracy.
Secure delivery throughout Canada. Free delivery available depending on the order amount.