{"product_id":"octo-calreact-5000d-dual-chamber-calcium-reactor","title":"Octo CalReact 5000D Dual Chamber Calcium Reactor","description":"\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute overview\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"o-paragraph\"\u003e\n\u003cstrong\u003eRated for Aquariums up to 608 Gallons\u003c\/strong\u003e\u003cbr\u003eFootprint: 18.1\" x 15.2\" | Body Diameter: 7.9\" | Height: 22.9\"\u003cbr\u003eRecirculation Pump: Reef Octopus VarioS 6 DC\u003c\/div\u003e\n\u003cdiv class=\"o-paragraph\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eOCTO CalReact 5000D Dual-Chamber Calcium Reactor\u003c\/h2\u003e\n\u003cp\u003eThe OCTO CalReact 5000D is Reef Octopus's flagship calcium reactor, engineered for large reef systems that demand reliable, automated calcium and alkalinity supplementation at scale. With a 15.2-liter media capacity and a rated tank range of 423 to 608 gallons, the CalReact 5000D handles the sustained mineral demand of heavily stocked SPS and mixed-reef systems where two-part dosing or kalkwasser can't keep pace.\u003c\/p\u003e\n\u003cp\u003eAt the core of the design is a dual-chamber, reverse-flow CO2 recirculation system. Aquarium water and CO2 enter the reaction chamber, where the reverse-flow configuration keeps CO2 circulating through the aragonite media rather than allowing it to escape prematurely. The result is a more thorough dissolution of calcium, magnesium, and trace elements with less CO2 waste. The integrated bubble counter makes it straightforward to dial in the CO2 drip rate, and the pH probe holder (probe sold separately) allows continuous monitoring of effluent alkalinity, enabling the reactor to be run in closed loop with an external controller.\u003c\/p\u003e\n\u003cp\u003eCirculation is handled by the VarioS 6 DC pump. The same variable-speed platform is used across Reef Octopus's professional skimmer line. Running at 70W with a maximum flow rate of 6,500 L\/h (1,720 gph) and a 4.9m (16 ft) max head height, the VarioS 6 gives the hobbyist precise control over recirculation speed without the noise or inefficiency of a fixed-speed AC pump. The removable lid simplifies media top-offs and chamber maintenance, and the hand-cast solid acrylic body is built to the same construction standard as Reef Octopus's protein skimmer line. \u003c\/p\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eDual-chamber, reverse-flow CO2 recirculation system extends contact time with aragonite media, improving dissolution efficiency and reducing CO2 consumption\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e15.2L (4.0 gal) media capacity supports sustained supplementation for large, high-demand reef systems without frequent top-offs\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eVarioS 6 DC pump operates at variable speed via detachable controller — adjustable flow from low to 6,500 L\/h (1,720 gph) to match tank demand\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eBuilt-in bubble counter for direct, visual monitoring of CO2 drip rate without external accessories\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003epH probe holder accommodates a standard probe (sold separately) for continuous effluent monitoring and compatibility with external pH controllers\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eRemovable lid provides full access to the reaction chamber for media loading and routine maintenance\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eHand-cast solid acrylic body construction — same material standard as Reef Octopus's protein skimmer line\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eCompatible with both wet and dry installation configurations; inlet\/outlet: 6.3mm (¼ inch)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIdeal For:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eLarge mixed-reef aquariums in the 420–600+ gallon range where consistent calcium and alkalinity demand exceeds what two-part or kalkwasser can practically provide\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSPS-dominant systems with high and consistent calcium draw that benefit from automated, stable supplementation rather than manual dosing adjustments\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eReef systems experiencing frequent two-part depletion or kalkwasser saturation limits and ready to transition to a reactor-based approach\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMulti-tank or system-fed installations where a single high-capacity reactor can serve shared water volume\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eHobbyists scaling up from a smaller reactor (such as the CalReact 3000D) as coral biomass and mineral demand have grown\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReaction chamber (dual-chamber, hand-cast acrylic)\u003c\/li\u003e\n\u003cli\u003eMain chamber cover (x1)\u003c\/li\u003e\n\u003cli\u003eSecond chamber cover (x1)\u003c\/li\u003e\n\u003cli\u003eVarioS 6 DC circulation pump with detachable controller\u003c\/li\u003e\n\u003cli\u003ePump union fitting pH probe holder (probe not included)\u003c\/li\u003e\n\u003cli\u003eBracket (x1) Sponge media filter pads (x4)\u003c\/li\u003e\n\u003cli\u003eCross connection fitting (x1)\u003c\/li\u003e\n\u003cli\u003eCO2 check valve (x1)\u003c\/li\u003e\n\u003cli\u003eEffluent control valve (x1)\u003c\/li\u003e\n\u003cli\u003eInlet\/outlet valves (x2)\u003c\/li\u003e\n\u003cli\u003eCO2 inlet valve (x1)\u003c\/li\u003e\n\u003cli\u003eInlet\/outlet fitting (x1)\u003c\/li\u003e\n\u003cli\u003eRubber shim (x1)\u003c\/li\u003e\n\u003cli\u003eO-rings (x3, assorted) \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eModel: CalReact 5000D\u003c\/li\u003e\n\u003cli\u003eConfiguration: Dual-chamber, reverse-flow CO2 recirculation\u003c\/li\u003e\n\u003cli\u003eMedia Capacity: 15.2 L \/ 4.0 US gal\u003c\/li\u003e\n\u003cli\u003eRecommended Tank Volume: 1,600–2,300 L \/ 423–608 US gal\u003c\/li\u003e\n\u003cli\u003eReactor Diameter: 200 mm \/ 7.9 in\u003c\/li\u003e\n\u003cli\u003eFootprint: 460 mm × 385 mm \/ 18.1 in × 15.2 in\u003c\/li\u003e\n\u003cli\u003eHeight: 580 mm \/ 22.9 in\u003c\/li\u003e\n\u003cli\u003eInlet\/Outlet Size: Ø 6.3 mm (¼ in)\u003c\/li\u003e\n\u003cli\u003ePump: VarioS 6 DC (variable speed, detachable controller)\u003c\/li\u003e\n\u003cli\u003ePump Power: 70W\u003c\/li\u003e\n\u003cli\u003ePump Max Flow Rate: 6,500 L\/h \/ 1,720 gph\u003c\/li\u003e\n\u003cli\u003ePump Max Head Height: 4.9 m \/ 16.0 ft\u003c\/li\u003e\n\u003cli\u003eSuggested Feed Pump Flow: 500–800 L\/h \/ 132–211 gph\u003c\/li\u003e\n\u003cli\u003eOperating Mode: Wet or dry installation\u003c\/li\u003e\n\u003cli\u003eBody Material: Hand-cast solid acrylic\u003c\/li\u003e\n\u003cli\u003epH Probe Included: No (probe holder included; probe sold separately)\u003c\/li\u003e\n\u003cli\u003eAragonite: Not included \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"features\"\u003e\n\u003ch2\u003eWARRANTY\u003c\/h2\u003e\n\u003cdiv class=\"featured-content\"\u003e\n\u003cp\u003eCoralVue, Inc. and Reef Octopus hereby guarantee this product to be free from defects in material and workmanship for a period of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFive (5) year warranty on pump body\/housing\u003c\/li\u003e\n\u003cli\u003eThree (3) year warranty on Reef Octopus branded controller\u003c\/li\u003e\n\u003cli\u003eOne (1) year warranty on Power Supply, Impeller (and components), Rotor, Rear Bushing, and Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWarranty is activated on the date of purchase.\u003c\/p\u003e\n\u003cp\u003eThis Standard Limited Warranty applies and is limited as follows:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTo the product only as long as it remains in the possession of the original purchaser.\u003c\/li\u003e\n\u003cli\u003eTo the product that has not been subject to accident, misuse or abuse.\u003c\/li\u003e\n\u003cli\u003eTo the product that has not been modified, altered, defaced, or had repairs made or attempted by other than CoralVue, Inc.\u003c\/li\u003e\n\u003cli\u003eThat CoralVue be immediately notified in writing within ten (10) days of first knowledge of defect by owner or his agent.\u003c\/li\u003e\n\u003cli\u003eThat CoralVue, Inc. shall be given first opportunity to make any repairs, replacements or corrections to the defective construction within a reasonable period of time.\u003c\/li\u003e\n\u003cli\u003eUnder no circumstances shall CoralVue and\/or the Manufacturer be liable by virtue of this warranty or otherwise for damage to any person or property whatsoever for any special, indirect, secondary or consequential damages of any nature however arising out of the use or inability to use because of the product defect.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eClick\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/coralvue.com\/warranty-info\" target=\"_blank\"\u003ehere\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eto learn more.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"features\"\u003e\n\u003cdiv class=\"featured-content\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv data-content-type=\"row\" data-appearance=\"contained\" data-element=\"main\"\u003e\n\u003cdiv data-enable-parallax=\"0\" data-parallax-speed=\"0.5\" data-background-images=\"{}\" data-background-type=\"image\" data-video-loop=\"true\" data-video-play-only-visible=\"true\" data-video-lazy-load=\"true\" data-video-fallback-src=\"\" data-element=\"inner\" data-pb-style=\"623D401AEB332\"\u003e\n\u003cdiv data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-pb-style=\"623D401AEB342\" data-decoded=\"true\"\u003e\n\u003cdiv class=\"product attribute overview\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv data-content-type=\"row\" data-appearance=\"contained\" data-element=\"main\"\u003e\n\u003cdiv data-enable-parallax=\"0\" data-parallax-speed=\"0.5\" data-background-images=\"{}\" data-element=\"inner\" data-pb-style=\"623D401AEB05E\"\u003e\n\u003cdiv data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-pb-style=\"623D401AEB06D\" data-decoded=\"true\"\u003e\n\u003cdiv class=\"product attribute overview\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute overview\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute overview\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv aria-expanded=\"false\" aria-selected=\"false\" aria-controls=\"reviews\" data-collapsible=\"true\" role=\"tab\" id=\"tab-label-reviews\" data-role=\"collapsible\" aria-labeledby=\"tab-label-reviews-title\" class=\"data item title\" tabindex=\"0\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"data item title\" aria-labeledby=\"tab-label-reviews-title\" data-role=\"collapsible\" id=\"tab-label-reviews\" role=\"tab\" data-collapsible=\"true\" aria-controls=\"reviews\" aria-selected=\"false\" aria-expanded=\"false\" tabindex=\"0\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Reef Octopus","offers":[{"title":"Default Title","offer_id":52475254767892,"sku":null,"price":1259.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0791\/0175\/5668\/files\/reef_octopus_calreact-5000d_1.webp?v=1778085304","url":"https:\/\/www.lushcorals.com\/products\/octo-calreact-5000d-dual-chamber-calcium-reactor","provider":"Lush Corals","version":"1.0","type":"link"}