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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 Regular Price: $
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    …you that your aquarium has not been topped off for an unusual amount of time, at least 24 hours, and double the average time between Top Off. Ex: if the Avg. time between topping off is 12 hours, the system will notify you after 24 hours of not topping off. Overfill Alert: The system develops and…

    $76.49 Regular Price: $89.99

    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…

    $119.99 Regular Price: $

    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".…

    $99.99 Regular Price: $

    …comes with everything you need to add and manage automatic top-off through your HYDROS Controller. Using a HYDROS aquarium controller for your auto top-off system is not only a reliable solution but it also helps clear wire clutter in and around your aquarium. HYDROS Water Level Sensor The HYDROS…

    $79.99 Regular Price: $

    …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 Regular Price: $

    …to 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 Regular Price: $

    …point, the pump will be activated until the water hits the next sensor. Fill Level:1" above the low-level sensor, this sensor turns the fill pump off when it detects water. High Level:1" above the fill level, and 2" above the low-level sensor, this sensor deactivates the pump when it senses water.…

    $50.99 Regular Price: $59.99
    Out of Stock

    …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 unitfor reefers on a budget.…

    $84.99 Regular Price: $

    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 Regular Price: $

    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 Regular Price: $

    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 Mounts with wires outside of chamber.…

    $15.99 Regular Price: $

    Optical sensors are the go to sensor if you want a reliable sensor over a long period. The Neptune Optical Sensor plugs directly into the FMM allowing you to monitor the level of your sump, mixing station, or any other reservoir with liquid in it. This sensor plugs into your FMM and, using reflected…

    $24.95 Regular Price: $

    …tall 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…

    $182.99 Regular Price: $
    Out of Stock

    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 This…

    $34.95 Regular Price: $

    …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. Max Water Pressure - 145 PSI (10 bar) Item #: 8555.200

    $89.99 Regular Price: $

    Enjoy a precise water level and peace of mind with the JBJ Dual Sensor auto top off system. With the included sensor cover you never have to worry about tank inhabitants causing false readings again, as an added bonus this cover will prevent sudden surface agitation from causing fluctuating water…

    $99.00 Regular Price: $
    Out of Stock

    The HYDROS Water Level Sensor is an optical sensor you can use for a variety of aquarium applications, such as sensing when your tank needs to be topped off or to detect when a dosing container needs a refill. The optical eye is magnetically coupled with the magnet side measuring only thick. It can…

    $39.99 Regular Price: $

    Easily replace the low voltage metering pump for your Tunze Osmolator Universal 3155 auto top off system.

    $23.99 Regular Price: $

    …tank down to the floor. All of the reefer systems include a proportionate sump, all the necessary plumbing, integrated auto top off system, and reservoir. Going from the top of the Reefer XXL system down to the bottom, the first thing you will notice is the crystal clear glass and elegant beveled…

    $3,999.00 Regular Price: $
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    …dosing tube holders round out the mainstays for a really well rounded sump design. Features: High quality full cast acrylic construction and full top support brace Quiet water flow operation design Interchangeable floss filter box and filter sock holder (filter sock included) Removable heater…

    $299.99 Regular Price: $
    Out of Stock

    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…

    $129.99 Regular Price: $

    …is pure and meets American Water Works Association and Water Chemical Codex requirements. Dosing with Kalkwasser is one of the very few proven, effective methods to add calcium and alkalinity with a single product while maintaining pH. Commonly used in conjunction with auto top off systems.

    $12.99 Regular Price: $
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    …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…

    $108.99 Regular Price: $
    Out of Stock

    …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…

    $134.99 Regular Price: $
    Out of Stock

    …This is a very handy application for the FMM. Place a flow sensor on a device like a carbon/gfo/biopellet reactor and it serves many purposes. First off, you will know if your pump is not not flowing correctly or failed altogether. Next, you can easily fine-tune the flow into the reactor by watching…

    $199.95 Regular Price: $

    …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…

    $182.99 Regular Price: $
    Out of Stock

    …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…

    $599.99 Regular Price: $
    Out of Stock

    …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 Regular Price: $

    …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…

    $124.99 Regular Price: $
    Out of Stock

    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 15 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…

    $199.99 Regular Price: $

    …for 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 Regular Price: $