Auto Top Off

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    Why does BRS recommend this? Bulk Reef Supply tried many different water level switches and auto top off solutions before giving the Tunze 3155 Osmolater Universal Auto Top Off BRS Recommended status. Despite its higher price this is by far our favorite solution. Spending the extra money on a Tunze…

    $199.99 $159.99

    …utilizing a safe and consistent auto top off system.  With multiple configurations, the JBJ A.T.O will fit almost anyone’s needs.  With linkable brackets adjust and secure float switches, you will need to add your pump of choice, the JBJ ATO system is a great top off unit for reefers on a budget.…

    $84.99

    With huge features jammed in a tiny package, the Duetto is the perfect ATO for your aquarium. XPAqua’s proprietary dual-optical sensor packs two precise level sensors in one incredibly small package. In addition to keeping your water level constant, the two sensors also work in concert with the…

    $119.99 $99.99

    The Tunze Osmolator Nano 3152 Auto Top Off is designed for smaller tanks, approximately 50 gallons and under. One of the safest ATO’s available. Utilizes a single sensor to monitor water levels and a controller that protects against overdosing. Magnetic holder for sensors up to 10mm or .39". Max…

    $97.46 $77.97

    …hobbyist has many challenges, but none is more annoying than the chore of adding water, every day, to make up for that lost to evaporation (a.k.a. topping off/up). This alone usually makes the automatic top-off (ATO) device the first piece of automation equipment purchased. The ironic flip side of…

    $199.95

    …when the unit is initially energized when the state changes the outlet will turn off preventing catastrophe. Use as High or Low Level Peace of mind No Moving Parts Plug & Play Magnetic Attachment Easy to Clean Sensor Auto Time Delay 10-Foot Cable   Specifications: Max Power Output - 1100W @ 110VAC…

    $59.99

    Build Your Own Auto Top Off System for your aquarium. Perfect for the DIY reefer who likes fun projects and wants to save a few dollars. Assembly requires only basic tools and no soldering. Basic knowledge of electrical wiring required. Aquahub DIY Top-it-Off Kit Premium Kit includes: (2) Aquahub…

    $45.99

    Everything you need to install a reliable Auto Top Off System! Dual Optical Sensors Magnetic Sensor Mounts Compact Design DC Feed Pump Fail-Safe Protection No Moving Parts   Auto Top Off Systems not only save you the daily chore of adding fresh water to your saltwater aquarium but will also keep…

    $126.99

    Auto Water Change Plus Auto Top Off    Change your reef tank's water automatically with AutoAqua's AWC system. AWC & ATO All-In-One. Water changes are one of the most time-consuming maintenance tasks with saltwater aquariums. There has been plenty of debate over how much water you should change and…

    $209.99

    …fail prematurely.  RO/DI System with an Auto Shut Off Valve - The solenoid valve can be placed anywhere after your DI and before the water enters your reservoir. This method will let you use your RODI system like normal if you split the RO or DI water off to any other reservoirs while allowing the…

    $69.99 $49.99

    …titanium ATO controller utilizes conductivity sensors making it a perfect auto top off controller for either fresh or saltwater aquariums. Hauling buckets, and daily refilling are now a thing of the past. Having an auto top off system monitor and control the water level in your aquarium will lead to…

    $69.99 $62.99

    …aquariums without sumps. The combination of the sleek overflow box and the innovative dual-optical sensor ATO will help to keep your aquarium topped off and your water crystal clear.    The overflow box easily mounts to any aquarium with its magnetic mount. It acts as a surface skimmer to rid your…

    $149.99

    …it to be maintained with the removable screen but the PMUP will also now automatically shut off when it detects that it is running dry, but also over temperature protection.   Perfect for: Auto Top Off Carbon Reactors GFO Reactors BioPellet Reactors Ideal for Salt or Freshwater   Auto-Top-Off (ATO)…

    $49.95

    AutoAqua auto top off units now have the ability to hook directly up to a RODI solenoid to replace the pump they are equipped with out of the box. If you have upgraded to a larger system, or just simply don't have the room for an ATO storage container this may be the option for you. Replacing the…

    $22.99

    The easiest top off reservoir to refill is now here. Just slide out the easy to access acrylic drawer and fill it with up to 5 gallons of fresh water. Just put your favorite ATO pump in the reservoir through the pre-cut out opening in the back and you are ready to top off. Dimension - 18.2" L x…

    $149.99 $134.99

    Replacement pump for Tunze Osmolator Universal 3155 auto top off system.

    $23.95 $19.16

    …where you want them in your sump, while only taking up a minimal amount of space.   CustomCradle XL: Holds up to 4 probes, 4 dosing tubes and 1 top off tube (up to 1/2 inch) Compatible with all temp, pH, conductivity and ORP probes including Neptune Apex Temperature Probe Magnetically mounts to…

    $34.99 $31.49

    …thick walls.   An auto top off system is one of the first automated devices any reef keeper should have. When water evaporates, the salt is left behind slowly increasing the salinity of the tank. By utilizing an ATO device evaporated water can easily be replenished by the top off unit throughout the…

    $134.99

    …switches are exposed to this kind of "spiking voltage" they can overheat and become deformed. In some cases they may even weld together or break off, causing the switch circuit to remain closed (or open) regardless of the level of the float. Deformed reeds can also function intermittently, causing…

    $10.99

    Perfect for controlling your RODI system, top off system, calcium reactor, or other low flow items that use 1/4" tubing. The solenoid valves uses the 24V accessory port found on 1Link modules and the EnergyBar 832.   Solenoid Valve (SV-1) This 24VDC powered, normally-closed (NC), solenoid valve has…

    $29.95

    …switches are exposed to this kind of "spiking voltage" they can overheat and become deformed. In some cases they may even weld together or break off, causing the switch circuit to remain closed (or open) regardless of the level of the float. Deformed reeds can also function intermittently, causing…

    $20.99

    …is the refugium section. The water then flows over the second baffle through 2 perforated platforms and under the third baffle into Section 3. The top perforated platform comes with a foam block filter and the bottom one is open to use for several different filtration methods (bag of carbon, bio…

    $399.99

    …is the refugium section. The water then flows over the second baffle through 2 perforated platforms and under the third baffle into Section 3. The top perforated platform comes with a foam block filter and the bottom one is open to use for several different filtration methods (bag of carbon, bio…

    $589.99

    …for auto top off applications. Our peristaltic pump has a slow, predictable 50 mL per minute flow rate which ensures gradual and subtle changes to water chemistry. Precision two roller design extends pump life and will not back siphon. 24-month warranty offered by Bulk Reef Supply.   BRS Top Off

    $79.99

    The easiest top off reservoir to refill is now here. Just slide out the easy to access acrylic drawer and fill it with up to 5 gallons of fresh water. Just put your favorite ATO pump in the reservoir through the included 4" x 1" opening in the back and you are ready to top off. Dimension - 8.1" L x…

    $99.99 $89.99

    …size   An Auto Top Off container is perfect for holding a fixed amount of top off water. An appropriately sized ATO reservoir would be able to supply your tanks ATO needs for a few days if not weeks, while not being too large to cause a big salinity swing or flood the sump if the top off pump were…

    $129.99

    …for use as a dosing pump for Kalkwasser, auto top offs, calcium reactors and other aquarium uses.   The Aqua Lifter Vacuum Pump is commonly used for applications that don't require precise dosing. They work best for dosing Kalkwasser or as auto-top off pumps. This unique one-of-a-kind vacuum pump…

    $59.99

    The Tunze Switched Socket Outlet connects any brand of pump to the Osmolator Universal 3155 Auto-Top off system. In the Osmolator and Osmomat, the enclosed low-voltage centrifugal pump can be replaced by this switched socket outlet in combination with a more powerful pump. The switched socket outlet…

    $71.53 $57.22

    …installation, a Socket Switch is included that allows you to run a pump up to 10A (1,200W). They even include a solenoid valve for aquariums that are topped off directly with an RO/DI system.    Features: World' First 4-Sensor ATO Low water level optical sensor Two sensor dual-stage overfill alarm…

    $199.99

    The low profile return bracket from Innovative Marine will keep your top off tubing secure and kink free. The Hydrofill ATO Return Bracket includes a 1/4" barbed fitting letting you easily connect your current top off unit to the "J" tube, making for a professional looking install.   Compatible with…

    $22.99 $20.69

    …properly sized sump, all the necessary plumbing, integrated auto top off system, and reservoir.   When water starts to evaporate all Reefer systems include an integrated top off system and reservoir that can hold a few days worth of top off water to keep the water level, salinity and flow rates…

    Starting at:
    $2,899.00

    …it to be maintained with the removable screen but the PMUP will also now automatically shut off when it detects that it is running dry, but also over temperature protection.   Perfect for: Auto Top Off Carbon Reactors GFO Reactors BioPellet Reactors Ideal for Salt or Freshwater   Auto-Top-Off (ATO)…

    $39.95