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Neptune DOS Dosing and Fluid Metering System (DOS)

Neptune DOS Dosing and Fluid Metering System (DOS)

SKU: T778

Experience unparalleled convenience and precision with the Neptune DOS Dosing and Fluid Metering System (DOS). Seamlessly connecting to any Apex system via AquaBus, the DŌS offers versatile dosing capabilities, including 2-part dosing (Calcium and Alkalinity), other additives dosing, automatic water changes, and micro-quantity dosing of liquid Foods and supplements. With intuitive software wizards in Apex Fusion, dosing becomes effortless and accurate, ensuring optimal conditions for your aquarium. Say goodbye to manual dosing and water changes with the Neptune DOS system.

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Neptune DOS Dosing and Fluid Metering System (DOS)



The DŌS is a multi-purpose Dosing and Fluid Metering System. It connects to any Apex via its AquaBus connection. 


  • 2-Part Dosing (Calcium and Alkalinity)

  • Other Additives Dosing

  • Automatic Water Changes

  • Micro-Quantity Dosing

  • Delivery of Liquid Foods and Supplements


The DŌS is a multi-purpose Dosing and Fluid Metering System. The DŌS connects to any Apex via its AquaBus connection.  The true versatility and functionality of the DŌS comes to life via the software wizards built into Apex Fusion.  This takes dosing to a whole new level in terms of ease of use as well as functionality when compared to standalone dosing systems because the DŌS is part of your Apex ecosystem. Not only can you integrate it into other operations and devices you have configured, but we also will be continuing to expand on its capabilities as time goes on via software updates to Apex Fusion.


The #1 reason people purchase a dosing system for their aquariums is for consistent and easy dosing of 2-part solutions (calcium and alkalinity) to their reef tanks. The most common method for doing this today is to use standalone dosing pumps and run them on a timer using seconds or minutes to determine how much to dose.

This can be confusing, and also prone to inaccuracy. With the DŌS (and the Apex Fusion interface) you simply enter the amount you want of each part of the additives (one on each pump) and what hours of the day you want it delivered. The DŌS then sets up all the dosing intervals within that time period. When that time interval is finished, the exact volume you set has been delivered.  It even automatically chooses the slowest speed necessary for the pump so that it minimizes noise.


Hate doing water changes? – everyone does – so they never get done as often as they should. Not only that, water changes are disruptive to the stability of your system since all of that change is happening at once.

With the DŌS all you do is place your empty vessel and your fresh stock of saltwater under your stand. Then, with the Apex Fusion wizard just tell it amount of water you want to change over what length of time and the hours of the day you want it to happen and it figures it all out for you.  It will perform an automatic, continuous water change for you. It gets better. If you have our dual optical water sensing accessory Apex Fusion will send you an email or text message letting you know it is time to change out the jugs.  Less time pumping, siphoning, and sloshing water and more time enjoying a great aquarium.

Click here for more information including an instructional video

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