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 $179.99

    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 an 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 $87.71

    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" L x…

    $99.99 $89.99

    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.

    $45.99 $41.39

    …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 $76.49

    Now Includes Siphon Break One of the smallest all inclusive auto top off systems on the market today. The Micro ATO includes an optical water level sensor to keep an eye on the level within the sump with no moving parts. The optical sensor is very reliable, even in complete darkness, keeping a…

    $134.99

    The safest standalone ATO on the market! The Neptune ATK System comes with everything you will need to get an automatic top off system up and running within minutes. The ATK can be used on its own without the necessity of an Apex Controller, but if you have an Apex, the ATK will integrate seamlessly…

    $199.95

    …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

    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

    $124.99

    ATO systems are very important on saltwater aquariums and can give you more success, and time to enjoy your tank. Aquamedic's Auto Top Off System Pro is a well thought out, plug and play design that incorporates every aspect of a safe and reliable ATO system. Water resistant controller Optical water…

    $159.99 $80.00

    …to fill until it reaches the second float switch and the valve turns off. The Tunze RO Water Controller 8555 also features a timer backup that can be set to either 12 or 24 hours. If the float switch hasn’t been triggered off within the set time the valve will close and an alarm will be activated.

    $212.45 $191.21

    Crystal ATO reservoirs feature crystal clear acrylic to hold top off water for your aquarium in a closed container to help keep dust and debris out. The Trigger Systems ATO containers have a removable lid to prevent excess evaporation, while providing a large opening to refill the reservoir as…

    $99.99 $89.99

    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

    Crystal ATO reservoirs feature crystal clear acrylic to hold top off water for your aquarium in a closed container to help keep dust and debris out. The Trigger Systems ATO containers have a removable lid to prevent excess evaporation, while providing a large opening to refill the reservoir as…

    $145.99 $131.39

    Sicce's MicraPlus pump is a fully submersible, compact pump with suction inlet is on the bottom for optimum operation with low water levels. Small size is great for indoor or outdoor fountains, aquariums and terrariums. Output: 158 GPH Max Head Height: 2.8 Ft Flow Regulator Power Consumption: 6.8W…

    $30.99 $27.89

    Optical sensors are the go-to sensor if you want a reliability over a long period of time. The Neptune Optical Sensor plugs directly into the FMM allowing you to monitor the level of your sump, mixing station, or any other reservoir that has up to 1/4" thick walls. Includes Magnetic Mount Neptune…

    $34.95

    Aqua Lifter Vacuum Pump’s unique design lifts water with its diaphragm and flappers – pumping water up to 30” high and at a flow rate of 3½ gallons per hour. Ideal for use as a dosing pump for Kalkwasser, auto top offs, calcium reactors and other aquarium uses.

    $59.99 $53.99

    Sapphire ATO reservoirs feature crystal clear acrylic with an elegant emerald top, to hold top off water for your aquarium in a closed container. The Trigger Systems ATO containers have a removable lid to prevent excess evaporation while providing a large opening to refill and clean the reservoir as…

    $114.99 $103.49

    Tunze Osmolator Switched Socket Outlet connects any brand of pump to the Tunze Osmolator Universal 3155. Great if you would like to replace the low-voltage centrifugal pump with a more powerful pump.

    $71.53 $64.38

    Innovative Marine has designed a low voltage, high performance air lift pump specifically for auto top off controllers. The Auqa Gadget HydroFill ATO Pump System works with the HydroFill ATO Controller System or ATO of your choice. Complete with Lift pump, return pipe and acrylic Max output of 15…

    $69.99 $62.99

    Emerald ATO reservoirs feature crystal clear acrylic with an elegant emerald top, to hold top off water for your aquarium in a closed container. The Trigger Systems ATO containers have a removable lid to prevent excess evaporation, while providing a large opening to refill and clean the reservoir as…

    $114.99 $103.49

    …probe holders are clutter free and one of the easiest probe holders to use, and maintain. Thumb screws are a thing of the past with the magnetically coupled, padded probe and dosing tube holder. A single CustomCradle can hold probes, top off tubing, and dosing tubing all in one probe holding device.

    $49.99 $44.99

    Vertex Cerebra Float Level Sensor is great for ATO systems, reservoirs, and many other applications. These float level sensors will directly connect to the Vertex Cerebra Controller's Multibar. Mini-DIN connector Reversible polarity Includes mounting nut Includes mounting gasket

    $19.99 $10.00

    Recommended for water applications like level controllers, auto top systems or other aquarium uses. Normally closed or normally open (see more) Float magnet is encased inside the float 48" leads (22 gauge wire) offer project flexibility M8 fitting – includes a nut and sealing O-ring

    $10.99 $9.89

    Smart ATO DC Replacement Pump will connect directly to Smart ATO Top Off Systems. Official replacement part Includes 6 foot power cord Connects directly to Smart ATO controller

    $23.00

    Recommended for water applications like level controllers, auto top systems or other aquarium uses Normally closed or normally open (see more) 14” leads (22 gauge wire) M16 straight threading - includes nut and silicon o-ring 5/8" Mounting hole required Mount with wires outside of chamber

    $15.99 $14.39

    Use the Water Valve 8555.200 from Tunze to connect to the Tunze Osmolator - the water valve replaces the pump with an electrically operated solenoid. Use it to control the flow of water from a tube rather than pumping it from a container like gravity-fed auto top off system.

    $91.37 $82.23