Blue Zone CR & CR Plus Series Calcium Reactors — Designed for reef aquariums of every scale, these single- and dual-chamber systems maintain balanced calcium and alkalinity through efficient CO₂ recirculation, quiet DC control, and durable cast-acrylic construction.Ships in approximately 10 days. Transit time varies by destination.
Price range: $429.99 through $849.99
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Blue Zone CR-Series Calcium Reactors (CR-150 / CR-200 / CR-250 / CR-150 Plus / CR-200 Plus)
Introduction
The Blue Zone CR-Series Calcium Reactors deliver consistent calcium and alkalinity replenishment for reef aquariums ranging from 130 to nearly 800 gallons. Each reactor uses a sealed CO₂ recirculation loop to dissolve aragonite media efficiently, maintaining balanced KH and calcium levels for demanding reef environments.
Built from heavy-gauge cast acrylic with precision-machined PVC fittings, every CR-Series reactor is engineered for quiet, reliable operation. The adjustable DC pump and LCD controller allow fine-tuned flow and CO₂ contact time, giving reef keepers full control over reactor performance.
Model Specifications
| Model | Recommended Tank Volume | Pump | Power | Chamber Diameter | Reactor Volume | Dimensions (L × W × H) |
|---|---|---|---|---|---|---|
| CR-150 | Up to 130 gal (≈ 500 L) | IC-2500 | 25 W | 5.9 in (150 mm) | 2.0 gal (≈ 7.5 L) | 10.2 × 9.1 × 21.7 in (260 × 230 × 550 mm) |
| CR-200 | 200 – 400 gal (≈ 800 – 1500 L) | IC-3000 | 30 W | 7.9 in (200 mm) | 3.6 gal (≈ 13.5 L) | 12.2 × 9.8 × 21.7 in (310 × 250 × 550 mm) |
| CR-250 | 400 – 650 gal (≈ 1000 – 2500 L) | IC-5000 | 45 W | 9.8 in (250 mm) | 5.5 gal (≈ 21 L) | 13.8 × 13.0 × 21.7 in (350 × 330 × 550 mm) |
| CR-150 Plus | 260 – 525 gal (≈ 1000 – 2000 L) | IC-3000 | 30 W | 5.9 in (150 mm) main + 2.8 in (70 mm) sub | 2.3 + 0.5 gal (≈ 8.5 L total) | 13.0 × 11.4 × 21.7 in (330 × 290 × 550 mm) |
| CR-200 Plus | 525 – 790 gal (≈ 2000 – 3000 L) | IC-5000 | 45 W | 7.9 in (200 mm) main + 3.5 in (90 mm) sub | 3.2 + 0.8 gal (≈ 15 L total) | 15.7 × 14.2 × 21.7 in (400 × 360 × 550 mm) |
System Overview
Standard Models (CR-150 / CR-200 / CR-250)
Single-chamber reactors with efficient CO₂ recirculation and uniform media flow. Ideal for reef tanks where simplicity, reliability, and space efficiency matter most.
Highlights:
• Compact footprint for sump installation
• Low CO₂ consumption via closed-loop circulation
• Simple setup and maintenance
• Quiet DC operation with digital controller
Plus Models (CR-150 Plus / CR-200 Plus)
The Plus versions add a secondary contact chamber that increases CO₂ dwell time and boosts dissolution efficiency. This second stage captures effluent from the main reactor, reducing acidity before discharge and improving stability in high-demand reef systems.
Highlights:
• Extended contact time for higher saturation and stability
• Reduced CO₂ use and longer media life
• Lower effluent acidity entering the sump
• Ideal for automated or SPS-dominant reef tanks
Choosing Between Models
The CR-200 and CR-250 provide outstanding output for reef systems up to ≈ 650 gallons. The Plus models enhance that performance for higher-load or low-maintenance setups, offering longer intervals between media changes and more efficient gas use.
Key Features
• Sealed CO₂ recirculation loop for stable output and reduced gas use
• DC circulation pump with adjustable LCD controller
• Thick cast-acrylic body and CNC-machined PVC lid/base
• Top-loading design for easy access to media
• Integrated bubble counter and effluent valve
• Silent running (< 40 dB)
• Clean plumbing layout with minimal maintenance
Warranty Coverage
1-year limited warranty.
Ships from Blue Zone Aquarium in Northern California with full U.S. warranty coverage. Current delivery time ≈ 2 – 3 weeks.
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What Customers Are Saying
Real reviews from Blue Zone Aquarium customers.
Verified ownerHealthy, vibrant, active, happy looking fish. Very satisfied ☺️
Verified ownerUnopened, in perfect condition. Haven't fed Sera Betta granules yet but excited to try it. It has rave reviews online. Very happy with my purchase.
Verified ownerHealthy, active Betta fish. Very curious and lots of personality. All his fins look healthy and he is swimming really well. Couldn't be happier with him. ☺️
Want to see something in person?
Give us a call if you’d like to stop by the shop sometime and take a look.
Blue Zone Aquarium is a home-based business operating out of a shop on our property,
our address is not posted publicly. We welcome local visits,
but pickup and shop visits are by appointment only
so we can make sure someone is available to help.
530-526-1532
support@bluezoneaquarium.com