{"product_id":"octo-cr220-calcium-reactor","title":"Octo CR220 Calcium Reactor","description":"\u003ch2 data-oe-version=\"1.2\"\u003eReef Octopus CalReact 220 Controllable DC Calcium Reactor\u003c\/h2\u003e\u003cp\u003eThe Reef Octopus \u003cb\u003eCalReact 220\u003c\/b\u003e (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.\u003c\/p\u003e\u003cp\u003eThe premium distinction of the CalReact 220 lies in its high-volume propulsion system: the controllable \u003cb\u003eVarioS 4 DC recirculation pump\u003c\/b\u003e. 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 \u003cb\u003ereverse-flow fluid layout\u003c\/b\u003e, 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.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eVariable Speed VarioS Pump:\u003c\/b\u003e Features multiple speed settings and feed-pause control modes, seamlessly integrating with third-party automation via an onboard 0–10V connection port.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eCO2​ Recirculation Engineering:\u003c\/b\u003e Traps and recirculates undissolved gas pockets within the upper neck structure, optimizing structural efficiency.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003ePrecision Effluent Control:\u003c\/b\u003e Upgraded gate valve plumbing enables micro-level output configuration, preventing the common \"clog and stall\" failures of cheap needle valves.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eProbe Integration Ready:\u003c\/b\u003e Securely houses standard monitor or controller probes directly in the primary acidic mix zone for absolute automation.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eIndustrial Quick-Connects:\u003c\/b\u003e Employs standard 1\/4-inch push-connect fittings for seamless integration into feed and effluent tracking lines.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSystem Capacity Handling\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eHeavy Demand (Packed SPS Reef):\u003c\/b\u003e 250 Gallons\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eMedium Demand (Mixed Reef):\u003c\/b\u003e 400 Gallons\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eLight Demand (Soft Coral\/LPS Display):\u003c\/b\u003e 500 Gallons\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Reef Octopus","offers":[{"title":"Default Title","offer_id":50484002259192,"sku":"OCT-CALR220","price":1027.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/6909\/5160\/files\/ebec70b998f3833e1ce3226fb1f4ea1f.jpg?v=1789092985","url":"https:\/\/www.blueearthaquariums.com\/products\/octo-cr220-calcium-reactor","provider":"Blue Earth Corals","version":"1.0","type":"link"}