Top Off

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    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…

    $52.99 Regular Price: $

    …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.…

    $92.00 Regular Price: $
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    …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.…

    $69.99 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…

    $224.95 Regular Price: $

    The IceCap Gravity ATO is a compact and simple auto top off solution for those wishing to replenish evaporated water in their aquariums without dealing with pumps, sensors, or power cords. No electricity required for operation Ideal for small aquariums or sumps Simple to set up and operate How It…

    $17.99 Regular Price: $

    …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…

    $99.99 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 to…

    $106.24 Regular Price: $124.99

    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 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…

    $219.99 Regular Price: $

    Quality Craftsmanship Where Form Matches Function Holds 4 Gallons / 15 Liters of fresh water for auto top off systems Hand-crafted, premium 100% acrylic construction Recessed flush mount lid with finger cutouts for easy removal Clear front panel with engraved graduated measurements Cutouts for ATO…

    $199.99 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 to…

    $209.99 Regular Price: $

    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…

    $127.99 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".…

    $114.99 Regular Price: $
    Out of Stock

    …Features: Slim and compact design to suit any aquarium set-up Works with rimless, eurobrace, and standard trim aquariums Entire skimmer box pulls off for routine maintenance 3/8” thick acrylic mounting wall and base on exterior box Front and back lid cover included to quiet noise Template…

    $153.99 Regular Price: $

    …the Reefer tank's return plumbing. Additional features of the Reef-Ready sump system include an RO reservoir that can hold a few days worth of top off water to keep the water level, salinity and flow rates consistent throughout the tank. 3+2 Extended Warranty Plans All REEFER aquariums have included…

    $1,798.00 Regular Price: $
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    …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 to…

    $209.99 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 to…

    $152.99 Regular Price: $179.99

    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…

    $229.99 Regular Price: $

    …does require the HYDROS system to function, if you already have a HYDROS aquarium controller, this is a very economical add-on to manage water top off functions. HYDROS Water Level Sensor The HYDROS Water Level Sensor contains no moving parts that can fail. Its extremely tiny; a little over a…

    $79.99 Regular Price: $

    …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 Doser…

    $79.99 Regular Price: $
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    …outlets and four USB ports that are WiFi controllable using the HYDROS app for Android and iOS/Apple mobile devices. You can turn outlets on and off wirelessly over a 2.4 GHz WiFi frequency. The Power 4 has a signal range of 98, so you can place power strips around your home without any difficulty…

    $199.99 Regular Price: $

    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…

    $142.99 Regular Price: $

    …can quickly monitor your remaining solution. Being acrylic, its impervious to chemicals used in reef keeping, including 2- or 3-part, RODI for top off, nutrient/bacterial supplements or lanthanum salts. The container also features a snug-fitting lid that will protect your solutions without creating…

    $34.95 Regular Price: $
    Out of Stock

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

    $28.29 Regular Price: $

    …range. We do not suggest using this pump for auto top off systems. Due to the slow flow rate and the motor's long duty-cycle, it is best suited for intermittent use and we highly suggest using a pump with a faster flow rate for an Auto Top Off System. What's Included? 1x Drew's Doser v2.0 10ft…

    $109.99 Regular Price: $

    …supply in the event of overflow. Features High precision stepper motor WiFi control via free mobile App Fully customizable water change and/or top off schedule Battery backup and memory settings Includes float sensors and alarms for overflow prevention Specifications Flow: 900mL per minute + Dosing…

    $494.99 Regular Price: $
    Out of Stock

    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…

    $31.95 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…

    $109.00 Regular Price: $

    The Tunze Switched Socket Outlet connects any brand of pump to the Osmolator Universal 3155 Auto-Top off system. 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 can be used to switch…

    $82.49 Regular Price: $

    …critical to prevent overheating when pulling the fleece in high flow applications. They added a redundant shut off sensor to ensure the fleece roll stops when the return pump shuts off. There are wire channels that hide the wires. On all models except the cube, the middle wall that separates the…

    $940.94 Regular Price: $1,106.99

    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: $

    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…

    $29.89 Regular Price: $

    Why does BRS recommend this? Water changes are a top secret to success in the hobby. Having equipment that makes water changes easier is the key to doing the water changes your tank needs on a regular basis. With high quality fittings at a very affordable price the Python water change systems will…

    $20.99 Regular Price: $
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