{"product_id":"oct-calr5000d","title":"Octo CalReact 5000D Dual Chamber Calcium Reactor","description":"\u003cdiv data-oe-version=\"1.2\"\u003e\u003cdiv\u003e\u003cdiv\u003e\n\u003ch2\u003eReef Octopus CalReact 5000D Dual Chamber DC Calcium Reactor\u003c\/h2\u003e\n\u003cp\u003eThe Reef Octopus \u003cb\u003eCalReact 5000D\u003c\/b\u003e (SKU: OCT-CALR5000D, also recognized across legacy series as the SRO-CR5000D) is an ultra-high-capacity, dual-tower aragonite-dissolving filtration system engineered for large, heavily stocked marine reef displays and commercial systems up to 800 gallons. In massive reef aquariums packed with fast-growing small polyp stony (SPS) corals, mineral uptake can easily exhaust traditional liquid dosing regimens, spiking monthly maintenance costs and destabilizing water parameters. The CalReact 5000D automates mineral replenishment by continuously dissolving ancient crushed coral skeletons inside a highly controlled, acidic environment, adding bio-available calcium, carbonates, magnesium, and essential trace elements directly back into your water column.\u003c\/p\u003e\n\u003cp\u003eThe defining breakthrough of the CalReact 5000D is its \u003cb\u003eDual-Chamber Architecture\u003c\/b\u003e. Traditional single-chamber reactors discharge an effluent with an extremely low, acidic pH (often between 6.5–6.7) due to the heavy injection of carbon dioxide (CO2​). If left unbuffered, this acidic trickle can steadily depress your display tank's overall pH. The 5000D passes this raw acidic effluent through a secondary 8.7-inch media column \u003ci\u003ebefore\u003c\/i\u003e it leaves the system. This second stage naturally absorbs residual CO2​ and dissolves extra aragonite, neutralizing the solution and boosting output pH to protect your delicate marine livestock.\u003c\/p\u003e\n\u003cp\u003ePropelled by the high-torque, variable-speed \u003cb\u003eVarioS 6 DC recirculation pump\u003c\/b\u003e, this unit utilizes a specialized pinwheel impeller and a high-purity ceramic shaft. Operating on safe 36V current via a detached digital controller, the pump drives a \u003cb\u003ereverse-flow fluid layout\u003c\/b\u003e that lifts water upward from the base of the chamber. This steady pressure keeps heavy media beds in uniform suspension, completely avoiding the clumping, cementing, and anaerobic channeling that plagues flat-bottom reactors. Handcrafted from heavy-wall, optical-grade cast acrylic, the CalReact 5000D stands as the premier choice for pristine chemical stability in high-volume reef displays.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003epH Shielding Secondary Chamber:\u003c\/b\u003e Degasses excess carbon dioxide, boosting effluent pH while squeezing additional mineral yield out of your aragonite media.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eControllable VarioS 6 DC Pump:\u003c\/b\u003e Offers multiple precise speed profiles and standalone feed-pause delays. Features a 0–10V port for seamless integration with third-party automation networks like the Neptune Apex.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eCO2​ Gas Recirculation:\u003c\/b\u003e Captures undissolved gas pockets at the primary neck assembly, re-injecting them into the water loop to conserve your bottle supply.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003ePrecision Gate Valve Tuning:\u003c\/b\u003e Includes an industrial-grade effluent micro-gate valve to lock in precise, drift-free daily drip rates.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eIndustrial Quick-Connects:\u003c\/b\u003e Standard 1\/4-inch push-connect interfaces allow for clean plumbing management across feed and effluent paths.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSystem Capacity Handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eHeavy Demand (Packed SPS Reef):\u003c\/b\u003e 400 Gallons\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eMedium Demand (Mixed Reef):\u003c\/b\u003e 600 Gallons\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eLight Demand (Soft Coral\/LPS Display):\u003c\/b\u003e 800 Gallons\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e","brand":"CoralVue","offers":[{"title":"Default Title","offer_id":47322758054057,"sku":"OCT-CALR5000D","price":1259.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/4958\/0912\/files\/2ca7d3d8bb67b9797762fbe795171f5f.jpg?v=1786228126","url":"https:\/\/worldwidecorals.com\/products\/oct-calr5000d","provider":"World Wide Corals","version":"1.0","type":"link"}