Reef Octopus KS150 Kalk Reactor – Easy Calcium, Alkalinity & pH Boost for Reef Tanks
$519.74
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Medium U.S. shipping: $49.99. This item does not qualify for standard free shipping.
Additional equipment required: ATO system, kalkwasser, feed pump, and control timer are required for operation.
Shipping & Delivery
Medium shipping: $49.99. The standard $100 free-shipping offer does not apply.
Most in-stock orders process in 1–3 business days. Estimated standard transit is 5–12 business days after dispatch. Backorders, preorders, and special orders follow their stated lead times. Dates are estimates, and separate shipments may have separate charges.
Review the Shipping & Live Arrival Policy and final charges at checkout. International rates and specialty charges are separate from domestic standard offers.
A Simple Way to Boost Calcium, Alkalinity & pH
Looking for an easier way to maintain stable parameters without jumping into a full calcium reactor setup?
The Reef Octopus KS150 Kalk Reactor is one of the simplest and most effective ways to improve calcium, alkalinity, and pH all with minimal equipment and maintenance.
What Is a Kalk Reactor? (Simple Explanation)
A kalk reactor mixes kalkwasser (calcium hydroxide) with fresh water from your ATO (auto top off system).
As water evaporates from your tank:
- Your ATO replaces it
- The reactor adds kalkwasser automatically
Result:
- Calcium added
- Alkalinity supported
- pH naturally increases
All without daily dosing.
Why Choose a Kalk Reactor?
Simple setup
Low maintenance
No CO₂ tanks required
Helps raise pH naturally
Great stepping stone before a calcium reactor
What It Helps With
- Low pH issues
- Maintaining calcium and alkalinity
- Reducing daily dosing
- Improving coral growth stability
Key Features
- Fully automated mixing chamber
- Designed to integrate with ATO systems
- Durable acrylic construction
- Compact footprint for sump setups
- Efficient kalkwasser mixing for consistent output
- Reliable performance for long term use
Ideal For
- Nano to medium reef tanks
- Mixed reefs and beginner SPS systems
- Hobbyists looking for a simple dosing solution
- Anyone not ready for a calcium reactor
How It’s Used
- Add kalk powder to the reactor
- Connect to your ATO system
- As water evaporates, kalkwasser is dosed automatically
Set it and let it run
Requirements (Sold Separately)
To operate this kalk reactor, you will need:
- Auto Top Off (ATO) system
- Kalkwasser (calcium hydroxide powder)
- Feed pump
- Control timer (for mixing cycles)
Specifications
- Rated for Aquariums up to 210 Gallons
- Footprint: 7.68" x 7.68"
- Body Diameter: 6"
- Height: 26"
Pro Tip
For best results, monitor alkalinity and pH regularly and adjust kalk concentration as needed.
Pairing a kalk reactor with stable evaporation and consistent ATO use will maximize performance.
Warranty
Backed by a 1-Year Manufacturer Warranty
Not sure if a kalk reactor or calcium reactor is right for your tank? Reach out we’re happy to help you choose the best setup.
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