The Neptune Apex DOS Dual Reservoir is an essential accessory designed to seamlessly integrate with your Neptune Systems DŌS dosing pump. This dual-chamber container provides a dedicated and reliable storage solution for various liquid additives, enabling precise and automated dosing to maintain stable water parameters in your saltwater reef aquarium. It simplifies the routine task of adding critical solutions, ensuring consistency and reducing manual effort for the busy aquarist.

Each side of the reservoir boasts a generous two-liter (2L) capacity, allowing for extended periods between refills. It connects directly to your DŌS unit and features integrated optical sensors that communicate with your APEX controller, providing timely alerts when fluid levels are low. Constructed from strong, cast-acrylic, this reservoir is built for durability and features a low-profile design to prevent accidental tipping. Refilling is made easy, and it utilizes convenient push-fit tubing connections for a secure setup.

This product is perfectly suited for reef aquarists utilizing the Neptune Systems ecosystem who seek to automate the precise delivery of 2-part solutions (alkalinity and calcium), various trace elements, or other essential additives. Its robust construction, integrated low-level sensing capabilities, and direct compatibility with the APEX system make it an indispensable tool for achieving consistent water chemistry and simplifying maintenance for a thriving reef environment.