Octo CR220 Calcium Reactor

Reef Octopus CalReact 220 Controllable DC Calcium Reactor

The Reef Octopus CalReact 220 (SKU: OCT-CALR220) is a high-capacity, controllable aragonite-dissolving reactor system engineered to maintain absolute chemical balance for large, heavily stocked marine reef aquariums up to 500 gallons. In massive systems packed with fast-growing small polyp stony (SPS) corals, daily skeletal mineral consumption climbs exponentially, rendering manual liquid dosing expensive and erratic. The CalReact 220 replaces multi-part daily routines by continuously circulating aquarium water through its spacious 8.7-inch chamber alongside pressurized carbon dioxide (CO2​). This gas safely depresses the internal pH to an acidic level, gently melting crushed ancient coral media down into its raw, bio-available mineral forms.

The premium distinction of the CalReact 220 lies in its high-volume propulsion system: the controllable VarioS 4 DC recirculation pump. Operating at a safe 24V working voltage, this variable-speed pump utilizes a specialized pinwheel impeller, high-purity ceramic shaft, and a detached digital controller to refine internal flow dynamics seamlessly. Embodying an optimized reverse-flow fluid layout, the pump continuously pushes water up from the bottom grid. This uniform upward lift prevents heavy media columns from packing down into solid bricks or forming anaerobic dead spots. Hand-crafted from solid, optical-grade cast acrylic and finished with an easy-to-remove thumbscrew lid, this elite reactor offers unparalleled chemical stability for thriving hard coral displays.

Key Features

• Variable Speed VarioS Pump: Features multiple speed settings and feed-pause control modes, seamlessly integrating with third-party automation via an onboard 0–10V connection port.

• CO2​ Recirculation Engineering: Traps and recirculates undissolved gas pockets within the upper neck structure, optimizing structural efficiency.

• Precision Effluent Control: Upgraded gate valve plumbing enables micro-level output configuration, preventing the common "clog and stall" failures of cheap needle valves.

• Probe Integration Ready: Securely houses standard monitor or controller probes directly in the primary acidic mix zone for absolute automation.

• Industrial Quick-Connects: Employs standard 1/4-inch push-connect fittings for seamless integration into feed and effluent tracking lines.

System Capacity Handling

• Heavy Demand (Packed SPS Reef): 250 Gallons

• Medium Demand (Mixed Reef): 400 Gallons

• Light Demand (Soft Coral/LPS Display): 500 Gallons

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