Dosing Pumps and Auto Top Offs

What is an ATO? An aquarium Auto Top-Off system measures water levels in the aquarium or sump. When the automatic top-off sensor detects a drop in water level, a pump sends fresh water from an auto top-off reservoir into the tank.

The best auto top off system, like the Tunze Osmolator, will have multiple sensors and fail safes to prevent flooding. A good nano auto top off, like the AutoAqua Smart ATO micro, has all this in a tiny form factor that fits in an all-in-one nano. A kalkwasser reactor can be attached to an ATO to replenish Ca and Alk in a reef aquarium.

An aquarium doser, like a peristaltic dosing pump, delivers small amounts of fluid in timed intervals. The timer is tuned to deliver elements at the same rate they are depleted. A reef doser setup will often have at least three pumps (for Ca, Alk, Mg).
85 Results
XP Aqua Duetto Dual-Sensor Complete Aquarium Auto-Top-Off ATO System

XP Aqua Duetto Dual-Sensor Complete Aquarium Auto-Top-Off ATO System

Neptune Systems DOS - Dosing and Fluid Metering System

Neptune Systems DOS - Dosing and Fluid Metering System

Kamoer X1 Single Dosing Bluetooth Micro-pump

Kamoer X1 Single Dosing Bluetooth Micro-pump

Tunze Osmolator Universal 3155 Auto Top Off ATO

Tunze Osmolator Universal 3155 Auto Top Off ATO

Tunze Osmolator Nano 3152 Auto Top Off ATO

Tunze Osmolator Nano 3152 Auto Top Off ATO

AutoAqua Smart ATO Micro - Automatic Top Off System

AutoAqua Smart ATO Micro - Automatic Top Off System

Neptune Systems DDR - DOS Dual Reservoir

Neptune Systems DDR - DOS Dual Reservoir

Neptune Systems OS-1-M Optical Level Sensor with Magnetic Mount

Neptune Systems OS-1-M Optical Level Sensor with Magnetic Mount

Neptune Systems PMUP v2 Practical Multipurpose Utility Pump

Neptune Systems PMUP v2 Practical Multipurpose Utility Pump

Neptune Systems ATK v2 - Automatic Top-Off Kit

Neptune Systems ATK v2 - Automatic Top-Off Kit

Simplicity Dosing Container - 3 x 2L Compartments (6L Total)

Simplicity Dosing Container - 3 x 2L Compartments (6L Total)

AquaMaxx DTH-1 Pro Magnetic Dosing Tube Holder

AquaMaxx DTH-1 Pro Magnetic Dosing Tube Holder

Bubble Magus Tube Holder

Bubble Magus Tube Holder

AquaMaxx Dosing Container DC-1

AquaMaxx Dosing Container DC-1

Tunze Osmolator Replacement Metering Pump

Tunze Osmolator Replacement Metering Pump

Tunze Osmolator Storage Container 27L (7.1 Gal) ATO Reservoir

Tunze Osmolator Storage Container 27L (7.1 Gal) ATO Reservoir

IceCap Auto Top Off ATO

IceCap Auto Top Off ATO

JBJ ATO Automatic Top Off System Water Level Controller

JBJ ATO Automatic Top Off System Water Level Controller

JBJ Automatic Top Off Nano ATO with Pump

JBJ Automatic Top Off Nano ATO with Pump

Kamoer F4 PRO Wifi 4 Channel Doser

Kamoer F4 PRO Wifi 4 Channel Doser

FX-STP Peristaltic WIFI Continuous Duty Dosing Pump - Kamoer

FX-STP Peristaltic WIFI Continuous Duty Dosing Pump - Kamoer

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