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Description
Neptune Systems Apex- DOS Dual ReservoirDOS Dual Reservoir with Optic Sensor DDR This attractive fluid containment system stores your dosing fluids in style and even tells you when its time to refill! Each side stores two liters (2L) of fluid Connects directly to your DS Optical sensors inform your APEX when levels are low Strong, cast acrylic construction Low profile wont easily tip over Easy to refill Push fit tubing connections Use for 2 part (Alk Cal), additives and other applications
DOS Dual Reservoir with Optic Sensor – DDRThis attractive fluid containment system stores your dosing fluids in style and even tells you when it’s time to refill!
Each side stores two liters (2L) of fluid
Connects directly to your DŌS
Optical sensors inform your APEX when levels are low
Strong, cast-acrylic construction
Low-profile – won’t easily tip over
Easy to refill
Push-fit tubing connections
Use for 2-part (Alk/Cal), additives and other applications
Style Meets Function, Deceiving Capacity, No-tip design
The DDR has great style and will stand out in anyones equipment room. But it’s not just about style. It may not look like it, but each side of the reservoir holds an ample two liters (2000 mL) of fluid. For most saltwater aquariums that are dosing Calcium and Alkalinity to their aquariums, this amount is more than enough to last at least two weeks. If you were dosing other additives it might last months before needing a refill.
Speaking of refills, the DDR has easy lift off lids that make refilling it super easy.
The DDR was also designed to have a low center of gravity. This means, unlike other reservoirs on the market, it is very difficult to inadvertently tip over and ruin your day.
Optical Sensors Alert You When It’s Time to Refill
The DDR is the only dosing container on the market that connects electrically to your DŌS and uses optical sensors that alert you when your fluid has approximately 20% remaining. This alert could be used to send you a text or an email, or even trigger other events on your Apex. Also, when detecting water level, optical sensors are far less likely to fail than their float switch counterparts.
Ready for Apex Fusion
Although not required, the DDR interfaces directly into your Apex Fusion dashboard. See in realtime your fluid levels and get an alarm when a reservoir runs low.
Specifications
Size (Approx.): 10.5″ x 8.5″ x 5.5″
Fluid Capacity (Approx.): 2000ml per side
Weight (Approx.): 2 pounds
Requires: Apex, Apex Lite, or Apex Jr. and DŌS to operate sensors
Package includes: DDR, 4m of DŌS tubing
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Great quality case and keyboard
Color: Purple, Color: Purple
Super good quality case, I was actually surprised since it’s such a good price. It fit my 10.9 inch perfectly! Keyboard has magnetic attachment to the case which is super handy, and it connected with Bluetooth seamlessly. Keyboard isn’t silent, it’s on the louder side, but not too loud at all and it doesn’t bother me at all because I prefer clickier keyboards. Oh also something that’s really cool is that you can change the colors of the keyboard, love that!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 10, 2026
★★★★★ 5
Amazing!
Color: Midnight Green
The Hamile Keyboard Case for iPad (11th & 10th Generation) is a practical accessory for turning your iPad into a more laptop-like setup. Designed with a detachable wireless keyboard and protective case, it’s aimed at students, professionals, and anyone who types frequently on their tablet.
One of its most appealing features is the 7-color backlit keyboard, which makes typing easier in low-light environments while also adding a customizable, stylish look. The backlighting can usually be adjusted in brightness and color, making it both functional and fun to use. The keys are generally responsive and comfortable enough for everyday typing tasks like emails, notes, and document work.
The case itself provides decent protection for the iPad, helping guard against scratches and minor bumps. It also holds the tablet at a stable viewing angle, which is useful for video calls, studying, or streaming. The wireless connection is typically simple to set up via Bluetooth, and the keyboard can be detached when not needed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
★★★★★ 5
No need to tap my Nails on the screen anymore!
Color: Pink, Color: Pink
Cute, convenient, and definitely needed! I use it every day to carry my emotional support device The keyboard case is sturdy, easy to use, and makes it so much more convenient to take my my girl everywhere. Extra added protection! (I’m clumsy and my iPad has fell quite a few times!) the keyboard works great, I typed a lot of emails and docs! Very happy with this purchase!
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Reviewed in the United States on June 5, 2026
★★★★★ 5
The blue is perfect!
Color: Navy Blue
The best quality iPad cover I have ever had. And the blue is so pretty!!!! The keyboard synced quickly and has soft keys.
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Reviewed in the United States on April 30, 2026
★★★★★ 4
Great quality case, keyboard doesn’t work as intended
Color: Dark Cherry
Case is fine and good quality but the keyboard doesn’t work as intended. Bluetooth connects great but the keyboard is formatted incorrectly. For example, when I try to use a dash, it puts an apostrophe instead. I have no idea how to reformat it myself. I’d love just a replacement keyboard
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Reviewed in the United States on January 31, 2026
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