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    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 Regular Price: $

    …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: $

    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…

    $214.99 Regular Price: $
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    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: $

    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".…

    $109.99 Regular Price: $
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    The Auto Aqua Smart Stir makes testing with liquid reagents a fast and effortless process. Just drop the magnetic stirring bar in the testing vial, put it on the stir base, and press the power button. Forget about tediously adding a drop of reagent and then swishing the vial by hand, struggling to…

    $29.99 Regular Price: $

    …Powered by Aquatrance 2000 pump Warranty: 1 year What's Included? Octo LUX T90 Aquarium Octo LUX Cabinet Stand Integrated Slim Overflow System Auto UP Reservoir Reef Octopus PVC Sump with Filter Sock ATO Float Valve AQ-3000 Return Pump Reef Octopus Classic 150INT Protein Skimmer Warranty 1 year…

    $1,890.00 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: $

    …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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    …100 GPD Dow Filmtec Membrane Deionization Single Mixed Bed DI Stage with Refillable Cartridge Single Mixed Bed DI Stage with Refillable Cartridge Auto Shut Off Valve Canister Wrench Laundry Tub Connection Adapter Chrome Faucet Diverter Valve Glycerin Filled Pressure Gauge Flush Kit Dual Inline TDS…

    $269.99 Regular Price: $
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    …follows the contour of the 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…

    $4,139.00 Regular Price: $
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    …less back pressure if you require long runs of tubing. This booster pumps requires a transformer which is sold separately. If your RO system has an auto shut off kit or you are planning on installing one the Aquatec PSW Pressure Switches (sold separately) is also required. Benefits of maintaining…

    $109.99 Regular Price: $
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    …of 8.0 8.4. If all parameters are correct, the salt water is ready to use. Note:Slight cloudiness is normal at this stage and indicates that the bio-active substances are taking effect. Not recommended for Auto Water Change systems since after a couple days a film will develop on the reservoir.

    $46.73 Regular Price: $
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    …Cartridge Dual Mixed Bed DI Stage with Refillable Cartridge Waste to Product Water Ratio 3:1 3:1 1.5:1 1.5:1 Rejection Rate 99% 98% 99% 98% Auto Shut Off Valve Flow Restrictor 550 ml/min 800 ml/min 550 ml/min 800 ml/min Canister Wrench Included Source Water Connections Chrome Faucet Diverter…

    $309.99 Regular Price: $
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    …Powered by Aquatrance 1000 pump Warranty: 1 year What's Included? Octo LUX T60 Aquarium Octo LUX Cabinet Stand Integrated Slim Overflow System Auto UP Reservoir Reef Octopus PVC Sump with Filter Sock ATO Float Valve AQ-2000 Return Pump Reef Octopus Classic 110INT Protein Skimmer Warranty 1 year…

    $1,496.25 Regular Price: $
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    …follows the contour of the tank down to the floor. All of the reefer systems include a properly sized sump, all the necessary plumbing, integrated auto top off system, and reservoir. When water starts to evaporate all Reefer systems include an integrated top off system and reservoir that can hold a…

    $4,354.00 Regular Price: $

    …Kalk reactor or drip system.By far the most common application for kalkwasser is by adding it to your tanks top offreservoirand then relying on the auto top off system to deliver small amounts of saturated kalkwasser solution throughout the day. How to Use Kalkwasser with an ATO System Step 1. Test…

    $62.99 Regular Price: $
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    Stop Floods and Wasting Water with the Only Electronic Auto Shut Off Valve Kit for RO/DI Systems XP Aqua RO/DI Flood Guardian is the perfect solution for any reefer that wants a float valve that they do not need to drill or permanently mount to a reservoir. The Flood Guardian uses a dual optical…

    $69.99 Regular Price: $

    …100 GPD Dow Filmtec Membrane Deionization Single Mixed Bed DI Stage with Refillable Cartridge Single Mixed Bed DI Stage with Refillable Cartridge Auto Shut Off Valve Canister Wrench Laundry Tub Connection Adapter Chrome Faucet Diverter Valve Glycerin Filled Pressure Gauge Flush Kit Dual Inline TDS…

    $259.99 Regular Price: $
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    …100 GPD Dow Filmtec Membrane Deionization Single Mixed Bed DI Stage with Refillable Cartridge Single Mixed Bed DI Stage with Refillable Cartridge Auto Shut Off Valve Canister Wrench Laundry Tub Connection Adapter Chrome Faucet Diverter Valve Glycerin Filled Pressure Gauge Flush Kit Dual Inline TDS…

    $219.99 Regular Price: $
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    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…

    $46.74 Regular Price: $54.99
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    …Pro Cation DI (Stage 1)Pro Anion DI (Stage 2)Pro Mixed Bed (Stage 3) Waste to Product Water Ratio 3:1 3:1 1.5:1 1.5:1 Rejection Rate 99% 98% 99% 98% Auto Shut Off Valve Flow Restrictor 550 ml/min 800 ml/min 550 ml/min 800 ml/min Canister Wrench IncludedSource Water Connections Chrome Faucet Diverter…

    $409.99 Regular Price: $
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    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: $

    …Pro Cation DI (Stage 1)Pro Anion DI (Stage 2)Pro Mixed Bed (Stage 3) Waste to Product Water Ratio 3:1 3:1 1.5:1 1.5:1 Rejection Rate 99% 98% 99% 98% Auto Shut Off Valve Flow Restrictor 550 ml/min 800 ml/min 550 ml/min 800 ml/min Canister Wrench IncludedSource Water Connections Chrome Faucet Diverter…

    $359.99 Regular Price: $
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    …Kalk reactor or drip system.By far the most common application for kalkwasser is by adding it to your tanks top offreservoirand then relying on the auto top off system to deliver small amounts of saturated kalkwasser solution throughout the day. How to Use Kalkwasser with an ATO System Step 1. Test…

    $38.99 Regular Price: $
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    …reactor or drip system.By far the most common application for kalkwasser is by adding it to your tanks top offreservoirand then relying on the auto top off system to deliver small amounts of saturated kalkwasser solution throughout the day. We suggest using BRS Calcium Chloride, BRS Sodium…

    $17.49 Regular Price: $
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    …100 GPD Dow Filmtec Membrane Deionization Single Mixed Bed DI Stage with Refillable Cartridge Single Mixed Bed DI Stage with Refillable Cartridge Auto Shut Off Valve Canister Wrench Laundry Tub Connection Adapter Chrome Faucet Diverter Valve Glycerin Filled Pressure Gauge Flush Kit Dual Inline TDS…

    $279.99 Regular Price: $
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    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: $

    …pump can be calibrated on its own, and then set into multiple different operational modes for the intended application. Easy to program Manual and auto quick settings Calibration cylinder included Adjustable dosing volume Delay settings for multiple pump regime Compact form factor Specifications:…

    $59.00 Regular Price: $

    …gallons Light Stocked Tank - Rated up to 200 gallons Features: Reverse flow design Control the reactor with CO2 needle valve and the effluent valve Auto fill bubble counter pH probe holder Easy to remove lid Precision effluent control valve Solid construction 1/4" quick connect fittings Reactor…

    $388.49 Regular Price: $
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