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Octo CR-140 Classic Calcium Reactor

Price:

$ 531.29

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Octo CR-140 Classic Calcium Reactor

https://www.coralvue.com/web/image/product.template/241/image_1920?unique=9ecd6e9

SKU: OCT-CR140

MSRP: $ 531.29

Where to Buy
  • Available Through Authorized Retailer
    Details
  • Reverse Flow Engineering: Forces water upward through the aragonite media, maximizing water and CO2​ contact time while preventing media compaction.
  • Aquatrance 2000 Power: Driven by a reliable, high-performance Aquatrance recirculation pump that provides consistent flow with low energy draw.
  • Integrated pH Probe Holder: Features a dedicated, built-in probe port to effortlessly track and automate internal chamber acidity levels.
  • Built-In Bubble Counter: Includes a clear visual bubble counter chamber to manually regulate and audit your precise CO2​ gas injection rate.
  • Heavy-Duty Construction: Hand-crafted from optical-grade solid cast acrylic with a thumbscrew-sealed lid for simple media replenishments.
  • Quick-Connect Plumbing: Outfitted with standard 1/4-inch quick-connect push fittings for seamless integration into feed and effluent lines.
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Reef Octopus
Reef Octopus

Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.

Reef Octopus Classic CR-140 Calcium Reactor

The Reef Octopus Classic CR-140 (SKU: OCT-CR140) is an automated, highly efficient aragonite-dissolving reactor system designed to stabilize and supplement calcium, alkalinity, and essential trace elements in marine reef aquariums up to 200 gallons. Maintaining optimal ionic balance manually becomes a grueling task as hard stony corals (SPS and LPS) mature and expand. The CR-140 replaces the volatility of multi-part daily liquid dosing by using pressurized carbon dioxide (CO2​) to safely drop the internal chamber pH, melting crushed ancient coral skeletons back into their raw, bio-available mineral states.

Constructed from premium, heavy-duty cast acrylic, the CR-140 relies on an advanced reverse-flow fluid layout. The integrated Aquatrance 2000 recirculation pump continuously pushes acidic water from the bottom of the 5.5-inch chamber upward. This configuration ensures that the CO2​ gas remains completely dissolved and distributed, maximizing contact time with the aragonite media while preventing the substrate from packing together into a solid brick. Complete with a modular screw-off lid, a functional bubble counter, and an integrated probe holder, this compact workhorse is the definitive upgrade for low-maintenance coral growth.

Key Features

  • Automated Skeletal Supplementation: Provides balanced ratios of calcium, carbonate hardness, strontium, and magnesium simultaneously.

  • Aquatrance 2000 Recirculation: Keeps the internal water loop moving consistently to eliminate dead zones inside the media column.

  • Recirculating CO2​ Geometry: Recycles unused gas pockets trapped inside the upper neck, minimizing overall CO2​ bottle consumption.

  • Probe Integration Ready: Port allows a standalone pH monitor or controller probe to monitor internal levels without risking leaks.

  • Effortless Plumbing Taps: Employs industrial-grade 1/4-inch push-connect fittings for precise incoming feed and outgoing effluent tracking.

Demand Handling

  • Heavy Demand: 100 Gallons

  • Medium Demand: 150 Gallons

  • Light Demand: 200 Gallons


What’s Included:

  • (1) Classic CR-140 Calcium Reactor Assembly

  • (1) Aquatrance 2000 Recirculation Pump

  • (1) Integrated Bubble Counter

  • (1) pH Probe Holder Port with Sealing Plug

  • (1) 1/4 in Quick-Connect Fitting Package

Technical Specs:

  • Model / SKU: CR-140 / OCT-CR140

  • Chamber Body Size: 5.5 in

  • Footprint: 12 in x 11 in

  • Total Height: 24 in

  • Media Capacity: 3.8 Liters (1 Gallon)

  • Recirculation Pump Power: 45 Watts

  • Maximum Suggested Feed Pressure Rate: 150 GPH

Note: Suggest a feed pressure slightly higher than a full-flowing influent

Recirculation Pump Information:

Pump: Aquatrance 2000
Max Water Flow: 582 gph*
Max Head: 6.9ft
Voltage: 120v/60Hz
Wattage: 45w
Dimensions (L x W x H): 5.3 x 2.8 x 4"

*Measurements are approximate and can vary

Explosion-Chart-for-CR-100-and-CR-140.png
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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.
  1. Unscrew the top thumb-locking flange screws and remove the main lid from the 5.5-inch acrylic cylinder.
  2. Rinse your preferred coarse calcium reactor aragonite media thoroughly to wash out dust, then add it to the chamber above the lower foam screen plate.
  3. Re-seat the top lid flange, verifying that the central silicone O-ring is perfectly aligned, and tighten down the thumb screws evenly.
  4. Insert your specialized aquarium controller pH probe into the designated holder port and tighten the compression nut to lock it down.
  5. Plumb your 1/4-inch incoming water feed line (from a dedicated feed pump or aquarium manifold) and your CO2​ gas source to their respective ports.
  6. Fill the internal chamber completely with tank water, turn on your effluent feed pump, and plug the Aquatrance 2000 recirculation pump into a GFCI outlet.

Pro Tips:

  • Coarse Media is Mandatory. Always utilize a high-quality, large-grain coarse aragonite media (such as large coral bones or premium coarse chips) inside the CR-140. Fine or small-grained media will quickly break down into a fine mud under the acidic conditions, restricting flow through the reverse-plumbed base and potentially choking the Aquatrance impeller.
  • Automate the Gas Injection. While you can manage a calcium reactor manually by monitoring the drip rate, we highly advocate plugging your CO2​ regulator solenoid into an electronic controller or pH controller. Program the solenoid to close if the internal chamber pH falls beneath 6.5, preventing the media from over-dissolving into mud during a system anomaly.
  • Effluent Line Scaling. The tiny effluent discharge line can slowly collect calcium carbonate deposits over time, which narrows the output path and stalls the incoming feed water flow. Check your effluent drip rate weekly, and blow a light push of warm RO/DI water or weak vinegar solution through the line every few months to keep the pathway completely free of crust.
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