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    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: $

    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: $

    …pump, the Versa is extremely precise, robust, and versatile. The Versa excels in many precision aquarium pump applications, including; dosing, auto top off (ATO), automated water changes, and reactor feeding. Precision DC Stepper Motor with planetary gearing mechanism Intelligent control w/BLE…

    $199.99 Regular Price: $

    A Complete, Simple, & Standalone ATO! If you want a safe ATO system, the Neptune System ATK v2 uses a mixture of optical eyes and a float valve to ensure your tanks water level stays the same while preventing overfills. With the ATK v2 you do not need an Apex Controller since it can be run 100%…

    $224.95 Regular Price: $

    …temperature 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…

    $109.99 Regular Price: $

    …Kit 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. While this ATO system does require…

    $79.99 Regular Price: $

    …shut itself off and give you an alert. Peace of mind No Moving Parts Plug & Play Magnetic Attachment Preset Safe Temps Easy to Clean Sensor Auto Time Delay Specifications: Temperature Range - 72°F to 84°F Power Input/Output - 110V AC @ 10 amps Max Power - 1100W for 110VAC Max Mounting…

    $53.99 Regular Price: $59.99

    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".…

    $114.99 Regular Price: $
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    …It utilizes the back pressure created by the float valve or pressurized tank to shut off the water supply to the membrane. Without an automatic shut off valve waste water would continue to run out after the float valve is activated or tank becomes full. Auto Shut Off Valve Installation Instructions

    $9.99 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…

    $52.99 Regular Price: $

    Keep salinity and your aquariums water level consistent with Reef Breeders low profile Prism-ATO. Water level changes are registered in fractions of a second using infrared level sensors and with all internal components built into the sensor, there are no additional controllers to mount. Reef…

    $69.99 Regular Price: $

    Make RO Water production more convenient with Tunze's automated RO Water Controller! The Tunze RO Water Controller 8555 is used to regulate the water level in your fresh water storage container. It uses two float switches to control an electronic valve. When the water level drops below the first…

    $234.99 Regular Price: $

    The Kamoer X2SR is a WiFi-controlled, peristaltic pump designed for auto water changes and auto top-offs in your aquarium. Instead of manually transferring large buckets of water on maintenance days, you can program your X2SR to replenish water at whatever time or speed you like. You can change as…

    $494.99 Regular Price: $
    Out of Stock

    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: $

    The new INTELLI-FEED auto feeder features simple design and programming, keeping your fish food dry and ready to feed up to 4 times a day. Easily program the feeder with touch controls. The mounting bracket is capable of rotating 360 degrees, so you can deliver food at the right spot. Features:…

    $62.99 Regular Price: $

    The FMM (Fluid Monitoring Module) is a multi-purpose module that, with the help of various accessories, enables your Apex to do: Flow Monitoring Leak Detection Water Level Detection Power 24VDC accessories Future sensors Return pumps Measuring the flow of your aquarium’s main return pump is an…

    $104.95 Regular Price: $

    Ideal 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 Regular Price: $
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    …detects pressure build up caused from your holding container becoming full. Most often triggered with a float valve Your system must have a working auto shut off kit for this switch to work properly. ¼” Push Connect fittings Preset at 40 PSI Adjustable (30-60) PSI "trigger point" for…

    $19.99 Regular Price: $

    Xp Aqua's Sumpless ATO - Complete ATO & Surface Skimmer for Sumpless Aquariums Sumpless ATO is the first and only ATO designed specifically 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…

    $149.99 Regular Price: $

    Choose the Aquatec Auto Flush Flow Retrictor that meets your RODI systems flow rate. 300 mL/min 400 mL/min 500 mL/min for 75 GPD single membranes or 150 GPD Water Saver Systems 600 mL/min 700 mL/min 800 mL/min for 100 & 150 GPD single membranes or 200 GPD Water Saver Systems The Aquatec…

    $54.99 Regular Price: $
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    Maintain a consistent salinity in your aquarium without relying on failure-prone float switches. Arguably the most time-saving addition to any tank, never worry about your aquarium running dry again. With all internal components built into the optical sensor housing, there are no additional…

    $99.99 Regular Price: $

    The AutoAqua Smart AWC Duo is an innovative 2-in-1 auto water changing and auto top-off system designed to simplify your tank maintenance routine. With its intuitive touch screen, Quick Security Technology and dual sensor failsafe, you can easily remove and replenish aquarium water both hands and…

    $307.99 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…

    $109.00 Regular Price: $

    …Available: 75 GPD Auto Flush Flow Kit - Compatible with 75 GPD membranes or 150 GPD Water Saver systems. Kit includes a 500ml/min Auto Flush Flow Restrictor. 100 GPD Auto Flush Flow Kit- Compatible with 100 GPD membranes or 200 GPD Water Saver systems. Kit includes an 800ml/min Auto Flush Flow…

    $107.49 Regular Price: $
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    …Available 75 GPD Auto Flush Flow Kit - Compatible with 75 GPD membranes or 150 GPD Water Saver systems. Kit includes a 500ml/min Auto Flush Flow Restrictor. 100 GPD Auto Flush Flow Kit- Compatible with 100 GPD membranes or 200 GPD Water Saver systems. Kit includes an 800ml/min Auto Flush Flow…

    $107.49 Regular Price: $
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    …4300 mL/145 oz of collection Extra chamber for collecting skimmate Carbon filter cup to help reduce odor - easily removed for carbon exchange Auto shut off feature to turn off skimmer and avoid overflows Item #: OCT-WC140 Height: 21.75" Diameter: 5.5" Footprint: 8.3" x 8.3" Drain line connection:…

    $299.99 Regular Price: $

    The perfect All-In-One, Plug-and-Play Auto Top-Off solution for aquariums under 50 gallons As fresh water evaporates from your saltwater aquarium, the salt that is left behind begins to build in concentration. Auto top off systems help to restore osmotic balance in your aquarium by refilling the…

    $142.99 Regular Price: $

    …of a float valve. ASOVs do require a minimum of 40 PSI to operate correctly and can be installed on any style of reverse osmosis system that uses 1/4" tubing. Auto Shut Off Kit Includes: Float valve 5ft of tube Inline check valve 1/4" auto shut off valve Auto Shut Off Valve Installation Instructions

    $24.99 Regular Price: $

    …1400 mL/49 oz of collection Extra chamber for collecting skimmate Carbon filter cup to help reduce odor - easily removed for carbon exchange Auto shut off and 5min delay feature to turn off skimmer and avoid overflows Specifications: Height: 18" Diameter: 3.9" Footprint: 6.5" x 6.5" 5 minutedelay…

    $279.99 Regular Price: $

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

    $28.29 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

    $104.99 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: $
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