Octo CR200 Calcium Reactor
SKU: OCT-CALR200
MSRP: $ 866.24
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Available Through Authorized Retailer
• Effortlessly maintain Calcium, Alkalinity, and trace element levels in demanding reef environments.
• Powered by the controllable VarioS-4 DC circulation pump for whisper-quiet, efficient operation
• Reverse-flow water design maximizes contact time between CO2, water, and media
• Integrated pH probe holder and built-in bubble counter for precision CO2 monitoring
• High-quality cast acrylic construction with a space-saving single chamber footprint
• Ideal For: Heavy bioload reefs up to 300gal; Light loads up to 500gal; automated mineral dosing
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
Reef Octopus VarioS CR200 8-inch Calcium Reactor
The Reef Octopus VarioS CR200 (OCT-CALR200) is a high-performance solution for aquarists looking to automate the complex task of maintaining alkalinity, calcium, and essential trace elements. Quality, modern design, and DC controllability define the VarioS series, making it a premier choice for demanding reef systems. Unlike traditional AC-powered reactors, the CR200 uses the variable-speed VarioS-4 pump, allowing users to fine-tune the recirculation rate for optimal media dissolution.
The reactor employs a sophisticated reverse-flow design, forcing water upward through the media to maximize contact time and prevent "channeling" or dead spots. This ensures that every ounce of aragonite media is utilized effectively. With its built-in CO2 recirculating feature, the CR200 recovers unused gas to increase efficiency and lower the overall pH within the chamber more effectively. The unit is thoughtfully designed with a precision effluent control valve and quick-connect fittings, simplifying the setup and tuning process for consistent daily mineral delivery.
Key Features:
- Controllable VarioS DC Pump: Offers variable speed settings, a feed mode, and high-efficiency performance with a 5-year warranty.
- Reverse Flow Design: Maximizes water-to-media contact while ensuring even dissolution of the aragonite.
- Comprehensive CO2 Tools: Includes a built-in bubble counter and a dedicated pH probe holder (probe sold separately) for total chamber monitoring.
- Auto Fill Feature: Integrated bubble counter and gas recovery system reduce CO2 waste.
- Durable Construction: Built with solid cast acrylic and 1/4" quick-connect fittings for a leak-proof experience.
- Easy Access Lid: Designed for simple media refills and routine chamber maintenance.
Ideal For:
- High-Demand SPS Tanks: Perfect for systems requiring high amounts of calcium and carbonate.
- Medium to Large Reefs: Rated for systems between 300 and 500 gallons, depending on bioload.
- Tech-Forward Hobbyists: Those who prefer the quiet operation and micro-adjustability of DC-powered equipment.
- Minimalist Sump Spaces: Compact footprint considering its high media capacity.
What's Included:
- R200 Calcium Reactor Body
- Reef Octopus VarioS-4 Recirculation Pump & Controller
- Precision Effluent Control Valve
- Reactor Plumbing, including Bubble Counter & pH Probe Holder
Specifications:
- Body Size: 8 inches
- Footprint: 15.2" x 10.6"
- Total Height: 23"
- Media Capacity: 2 Gallons / 8 Liters
- Inlet/Outlet Size: 1/4" Quick Connect
- Suggested Feed Rate: 130–200 GPH
Recirculation Pump Specs:
- Input: 1.25" Male Union Thread
- Output: 32mm/1" Slip PVC or 3/4" Barb
- Max Flow: 1050 GPH
- Max Head: 14.7 FT
- Max Wattage: 40W
- Voltage: 24V DC
- Dimensions: 5.7" L x 3.75" W x 5.5" H
- Cable Length: 6 FT
Note: Suggest a feed pressure slightly higher than a full-flowing influent
WARRANTY
CoralVue, Inc. and Reef Octopus hereby guarantee this product to be free from defects in material and workmanship for a period of:
- Five (5) year warranty on pump body/housing
- Three (3) year warranty on Reef Octopus-branded controller
- One (1) year warranty on Power Supply, Impeller (and components), Rotor, Rear Bushing, and Gaskets
Warranty is activated on the date of purchase.
This Standard Limited Warranty applies and is limited as follows:
- To the product only as long as it remains in the possession of the original purchaser.
- To the product that has not been subject to accident, misuse or abuse.
- To the product that has not been modified, altered, defaced, or had repairs made or attempted by other than CoralVue, Inc.
- That CoralVue be immediately notified in writing within ten (10) days of first knowledge of defect by owner or his agent.
- That CoralVue, Inc. shall be given first opportunity to make any repairs, replacements or corrections to the defective construction within a reasonable period of time.
- Under 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.
Instructions:
- Fill the reactor chamber with high-quality aragonite media and rinse thoroughly.
- Secure the pH probe (optional) into the probe holder and tighten the gland.
- Connect your feed pump to the 1/4" inlet, ensuring the feed pressure is slightly higher than the influent flow.
- Connect the CO2 line to the bubble counter and set a slow initial drip rate.
- Power on the VarioS pump and use the controller to set the desired recirculation speed.
- Use the precision effluent valve to adjust the output flow until your desired alkalinity levels are stabilized in the aquarium.
Pro Tips:
- Choose the Right Feed Pump. The CR200 performs best when fed with a consistent pressure. Use a dedicated small pump or a manifold feed with a flow rate between 130–200 GPH to ensure the reactor remains pressurized and free of air pockets.
- Monitor Your pH. For maximum stability, use a pH controller to manage your CO2 solenoid. Maintaining a pH of 6.5–6.7 inside the chamber is generally the "sweet spot" for dissolving aragonite media without turning it into "mush".
- Don't Forget the Rinse. When adding new media, always rinse it in a bucket of RO/DI water first. Fine dust from unrinsed media can clog the recirculation pump impeller or the effluent valve, leading to inconsistent performance.