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    The new INTELLI-FEED auto feeder has a very innovative design with the all new feeding arm, and easy to program touch control. The feeding arm design keeps food dry which results in less clumping, more consistent feedings, and control.   Features: Easy to program Keeps food dry in a sealed closed…

    $78.49

    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   Auto Top Off Systems not only save you the daily chore of adding fresh water to your saltwater aquarium but will also keep…

    $126.99

    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 the…

    $119.99

    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…

    $199.99

    Auto Water Change Plus Auto Top Off    Change your reef tank's water automatically with AutoAqua's AWC system. AWC & ATO All-In-One. Water changes are one of the most time-consuming maintenance tasks with saltwater aquariums. There has been plenty of debate over how much water you should change and…

    $209.99

    Xp Aqua's Ultimate ATO - The most complete ATO on the market    With 2x dual-optical sensors, the Ultimate ATO is the first ATO to include 4 sensors. The 4 sensors allow a dual-stage overfill alarm that is less intrusive as well as a run-dry protection feature that prevents your sump from running…

    $199.99

    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

    …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

    …will turn off preventing catastrophe. Use as High or Low Level Peace of mind No Moving Parts Plug & Play Magnetic Attachment Easy to Clean Sensor Auto Time Delay 10-Foot Cable   Specifications: Max Power Output - 1100W @ 110VAC Max Mounting Thickness - 1/2" Power On Delay - 10 Seconds Detection…

    $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". Max…

    $97.46

    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

    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 Auto-Flush…

    Starting at:
    $54.99

    …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

    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…

    $149.99

    …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…

    Starting at:
    $104.99

    …approx. 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…

    $234.99

    …approx. 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 15min delay feature to turn off skimmer and avoid overflows   Specifications: Height: 18" Diameter: 3.9" Footprint: 6.5" x 6.5" 15…

    $219.99

    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%…

    $199.95

    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

    Replacement pump for Tunze Osmolator Universal 3155 auto top off system.

    $23.95

    The low profile return bracket from Innovative Marine will keep your top off tubing secure and kink free. The Hydrofill ATO Return Bracket includes a 1/4" barbed fitting letting you easily connect your current top off unit to the "J" tube, making for a professional looking install.   Compatible with…

    $22.99

    The Tunze Switched Socket Outlet connects any brand of pump to the Osmolator Universal 3155 Auto-Top off system. In the Osmolator and Osmomat, 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…

    $71.53

    …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

    $91.37

    Replacement Santoprene tube for the BRS 2 Part and BRS Top Off Doser.

    $12.99

    …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.   The Aqua Lifter Vacuum Pump is commonly used for applications that don't require precise dosing.…

    $59.99

    The new INTELLI-FEED auto feeder has a very innovative design with the all new feeding arm, and easy to program touch control. The feeding arm design keeps food dry which results in less clumping, more consistent feedings, and control.   The new INTELLI-FEED auto feeder has a new innovative design…

    $96.66

    HydroFill ATO Controller System Manufacturer's Manual HydroFill ATO Controller System Manufacturer's Specs   HydroFill ATO Pump Specifications Pump Dimensions: 3.38" x 2.75" x 5.59" Voltage: 12V Power Consumption: 10W GPH: Up to 15 GPH Up to 5ft head pressure 1/4" barb fitting 2 Year Warranty  …

    $69.99

    Check valves only allow water to flow one direction. 1/8" Male NPT x 1/4" Push Connect elbow check valves are typically used on the product water output of RO membrane housings to protect from back pressure and allow auto shut off valves to operate correctly.

    $3.99

    …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.

    Starting at:
    $12.99

    …use the Manual, Quick Set or Auto mode. Manual Mode - Tune the light for customized spectrums and intensities that can be viewed instantly.  Quick Set - Create your own 24-hour custom lighting cycle that can be repeated daily with up to 6 different set points. Auto Mode - Replicate seasonal growing…

    $109.00

    …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 application…

    $19.99

    …continuous operation out of the Smart ATO pumps, but if you use kalkwasser or other additives in your ATO, they can lead to premature failure.    Auto top off pumps can fail from time to time and having a back-up pump on hand is always a smart thing to do. Making sure your system keeps topping off…

    $23.00