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    …dual-sensor ATO Two layers overfill protectionIntelligent QST programming Secondary optical sensor Super precise water level control Super easy installation; plug-and-play No programming or adjustments required Works in complete darkness Specifications: ATO DC Pump Max Head - 8.2 ft ATO DC Pump Flow…

    $127.99 Regular Price: $

    …or hard wood floors. For the value, and reliability it is hard to beat. Max Head Height: 7.2 ft The Tunze Osmolator 3155 is one of the safest ATO’s available. It utilizes an electronic eye sensor to monitor water levels and a backup float switch sensor with an optional audible alarm. The…

    $229.99 Regular Price: $
    Out of Stock

    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: $

    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: $

    …HYDROS ATO 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…

    $79.99 Regular Price: $

    (ATO) device the first piece of automation equipment purchased. The ironic flip side of this decision is that a faulty ATO device is one of the leading reasons for catastrophic aquarium failure, or even worse, flooding of the house or business. Not all ATO devices are created equal. Sadly, many ATO

    $224.95 Regular Price: $
    Out of Stock

    Why does BRS recommend this? One of the most popular ATO systems available. The JBJ A.T.O system is by far the mostcost-effectiveway of 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…

    $92.00 Regular Price: $

    …system. The Exo Mounts easily to clear sump and aquarium walls with internal magnets that securely hold up to 1/4" thick. The Reef Breeders Exo ATO system is an ultra-intelligent and compact bundle at an affordable price sure to make your tank more enjoyable. Intelligent Redundancy: Frequency…

    $99.99 Regular Price: $

    …to drill or permanently mount to a reservoir. The Flood Guardian uses a dual optical sensor that can be magnetically attached to 5-gallon buckets, ATO containers, or even large saltwater mixing reservoirs, but then moved to any other container within seconds without leaving any holes behind. When…

    $69.99 Regular Price: $

    …slim ATO reservoirs make the perfect space-saving addition to any aquarium system. Features Only 3 wide -- ideal for tight cabinet spaces 1/4 black acrylic construction Clear front panel to check water level Beveled edges Hinged flip-top lid with knob 1.25 hole for cord placement Fits all ATO pumps…

    $125.00 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…

    $279.99 Regular Price: $
    Out of Stock

    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: $
    Out of Stock

    …agitation from causing fluctuating water levels.Everything included, just install and enjoy consistent water and salinity levels. The JBJ Nano ATO is the perfect upgrade for your aquarium. Specifications: Power Input - 120V AC, 60Hz DC Pump Max Head - 7.2 feet Pump Flow Rate - 74 gph Max Mounting…

    $109.00 Regular Price: $

    …Trigger Systems ATO containers have a removable lid to prevent excess evaporation while providing a large opening to refill and clean the reservoir as needed. Each ATO reservoir has two 0.25” OD holes for tubing or wires for float switches. The Sapphire, Trigger, Ruby, and Emerald line of ATO

    $198.99 Regular Price: $

    …slim ATO reservoirs make the perfect space-saving addition to any aquarium system. Features Only 6 wide -- ideal for tight cabinet spaces 1/4 black acrylic construction Clear front panel to check water level Beveled edges Hinged flip-top lid with knob 1.25 hole for cord placement Fits all ATO pumps…

    $155.00 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: $
    Out of Stock

    Connects directly to AutoAqua's Smart ATO and Smart ATO Micro! AutoAqua's Smart ATO DC Refill Pump only takes a few minutes to replace, and in all honesty, they are not the highest quality, but they are low in price, making it wallet-friendly to keep a back-up on hand in case your current one fails.…

    $29.90 Regular Price: $

    …Systems ATO containers have a removable lid to prevent excess evaporation while providing a large opening to refill and clean the reservoir as needed. Each ATO reservoir has two 0.25” OD holes for tubing or wires for float switches. The Sapphire, Ruby, and Emerald line of ATO reservoirs…

    $129.99 Regular Price: $

    …for an ATO storage container this may be the option for you. Replacing the stock pump with the Smart Solenoid will easily take under 1 minute. Simply disconnect your current pump from the controller and plug in the solenoid. It is that easy. The solenoid works in conjunction with the ATO controller…

    $29.89 Regular Price: $

    Prevent overflows or equipment from running dry! Customize your AutoAqua Smart ATO, ATO Micro, or AWC with your own pump. Just insert the male barrel plug into your Smart controllers pump port, plug the outlet into any wall socket, and then your pump into the Smart AC Socket. This is the perfect…

    $30.00 Regular Price: $

    …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 needed. Each ATO reservoir has two 0.25” OD holes for ato plumbing or wires for float switches. Dimensions: 6”…

    $129.99 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: $

    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 11.5" W x 20.3" H 5 gallon capacity Slide out acrylic refilling drawer Rear opening for pumps and tubing Floating water line indicator Glass construction Most of the time ATO

    $142.99 Regular Price: $

    …so if a motor or pump quits drawing current or draws too much, you will be immediately notified. Available Drive Port Accessories Auto Top-Off (ATO) pumps Cooling fans Cabinet LED lights Solenoids to control reverse osmosis systems Probe Port One of the most remarkable ports on the HYDROS Control…

    $449.99 Regular Price: $
    Out of Stock

    ATO containers have a removable lid to prevent excess evaporation, while providing a large opening to refill and clean the reservoir as needed. Each ATO reservoir has two 0.25” OD holes for tubes to be plumbed through, or wires for float switches. The Sapphire, Ruby, and Emerald line of ATO

    $189.99 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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    …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 12.2" W x 23" H 15 gallon…

    $219.99 Regular Price: $

    ATO reservoir, Ice Cap sumps have the features you need with nothing you don’t. Features Solid acrylic construction Dedicated protein skimmer (and/or reactor) chamber Adjustable baffles with built-in probe holders Dedicated return pump chamber Dedicated freshwater reservoir with lid for ATO

    $482.99 Regular Price: $

    …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 needed. Each ATO reservoir has two 0.25” OD holes for ato plumbing or wires for float switches. Dimensions: 10”…

    $189.99 Regular Price: $

    …of sight. The ventilated back panel keeps heat and humidity to a minimum so you can comfortably operate a small chiller, aquarium controller, or ATO inside of the stand. 15g Stand Specifications Dimensions: 16L 14W 36H Finish: High Gloss Black Weight: 55 lbs Whats Included? 15g High Gloss Cabinet…

    $230.00 Regular Price: $

    ATO containers have a removable lid to prevent excess evaporation, while providing a large opening to refill and clean the reservoir as needed. Each ATO reservoir has two 0.25” OD holes for tubes to be plumbed through, or wires for float switches. The Sapphire, Ruby, and Emerald line of ATO

    $124.99 Regular Price: $

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

    $28.29 Regular Price: $