Auto Top Off Systems

An Auto Top Off (ATO) system is a great investment for saltwater aquarium owners because it helps maintain steady salinity levels. When water evaporates, the salt stays behind. Increasing salinity levels, which if left unchecked for too long, can stress fish and coral. The ATO system senses when the water level gets low and adds fresh water, keeping everything just right for the tank inhabitants and eliminating the need for daily manual top-offs.

Tunze Osmolator 3 - New at BRS

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23 Items

  1. ATK V2 Auto Top Off Kit
    Neptune Systems
    ATK V2 Auto Top Off Kit
    $239.99 $239.99

  2. Dual Sensor Nano Auto Top Off
    JBJ
    Dual Sensor Nano Auto Top Off
    $109.00 $109.00

  3. Water Valve 8555.200
    Tunze
    Water Valve 8555.200
    $129.99 $129.99

  4. Multi Tube Holder
    Tunze
    Multi Tube Holder
    $14.99 $14.99

  5. Extension Cable For Osmolator 3 (3 Meters)
    Tunze
    Extension Cable For Osmolator 3 (3 Meters)
    $24.49 $24.49

  6. RO Water Controller
    Tunze
    RO Water Controller
    $259.99 $259.99