Auto Top Off Units

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Avast Marine Top Off Kit
Starting at: $89.99
Finally, a top-off control sensor that is mounted to your sump with a magnet rather than a clunky bracket! Driven by a pressure-sensitive switch located in the relay box, a strong magnetic field won't affect its operation. The sensor tube can't get clogged with calcium deposits or activated by wayward snails as there are no moving parts. Our top-off system is capable of maintaining the sump water level within +/- 1/4" tolerance (1/2" overall) and features a built-in range buffer or hysteresis effect, which prevents rapid on-off switching that sometimes occurs when cheap float switches bob up and down in small waves. The magnet bracket is capable of holding on up to 1/2" thick glass. The slim design relay box is unobtrusive and can handle up to a 3 amp pump at 110v AC. The green LED light indicates when the circuit is active and the pump is running. Learn More -
Tunze 3152.000 Nano Osmolator
$104.66Tunze 3152.000 Nano Osmolator Learn MoreFree using 10500 Specialty Reward Points!
Earn 104 Specialty Reward Points -
Elos OsmoController Digital
$195.99The entirely new Elos OSMOCONTROLLER Digital uses a patent pending sensor with no moving parts as the first measure of the water level in the SUMP. Most other systems will use multiple float switches or sensors to act as back up to the initial float switch, elos does not. We believe the float switch or sensor will always be the weak link as it is usually a moving part and/or in direct contact with the water, most of the time. To provide an adequate fail-safe the Elos OSMOCONTROLLER Digital uses a small microprocessor in combination with our patent pending sensor to control the pump and monitor the top off of your system. In the event of a fault such as an empty reservoir, a damaged pump or kinked tube, the microprocessor will recognize this and a red alarm LED will indicate the problem and stop pumping until the problem is fixed and the controller can be reset.
The OSMOCONTROLLER Digital also has a manual top off button that can be used to use the system as a pump for occasional water changes and to fill a container with RO/DI water easily.
Learn MoreFree using 19600 Specialty Reward Points!
Earn 195 Specialty Reward Points -
Elos System Water Level Osmocontroller 2
$189.99Elos System Water Level Osmocontroller 2 Learn MoreFree using 19000 Specialty Reward Points!
Earn 189 Specialty Reward Points -
JBJ Auto Top Off
$77.20JBJ Automatic Top Off (ATO) System Water Level controller
Learn MoreFree using 7800 Specialty Reward Points!
Earn 77 Specialty Reward Points -
Genesis Reef Systems Storm Basic
$199.95What's Included:
- (1) STORM™ Control Module
- (1) Dual Level Sensor Harness
- (4) Level Sensor Shrouds
- (2) Level Sensor Mount Vertical Members
- (4) Suction Cups
- All necessary Mounting Hardware
Free using 20000 Specialty Reward Points!
Earn 199 Specialty Reward Points -
Genesis Reef Systems Storm Pro
$299.95
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STORM™ Pro - Specialized Top Off and Replenishment Module
What's Included
(1) STORM™ Control Module
(1) ROCv™ Module
(2) Dual Level Sensor Harnesses
(2) Standalone Level Sensor Harnesses
(6) Level Sensor Shrouds
(2) Level Sensor Mount Vertical Members
(4) Suction Cups
All necessary Mounting HardwareFree using 30000 Specialty Reward Points!
Earn 299 Specialty Reward Points -
Tunze 3155 Osmolator
$206.10TUNZE Osmolator Universal Learn MoreFree using 20700 Specialty Reward Points!
Earn 206 Specialty Reward Points








