Dosing kalkwasser by hand or through a simple drip system can leave undissolved calcium hydroxide settling at the bottom of the mixing container, reducing how much actually reaches the tank. The Reef Octopus KS Nilsen Kalkwasser Reactor line uses a high-torque, low-RPM motor to gently stir the mix and keep it fully in suspension.
Why Stirred Beats Static Kalkwasser Mixing
Calcium hydroxide doesn't stay evenly suspended on its own — static mixing containers let it settle, meaning the solution reaching your tank becomes progressively weaker as the powder collects at the bottom. A Nilsen-style reactor's slow, gentle stirring keeps concentration consistent from top to bottom.
Choosing a Size
- KS100 — uses a high-torque, low-RPM motor to gently stir kalkwasser instead of relying on settling and static mixing.
- KS150 — steps up chamber capacity from the KS100 for reef systems dosing more kalkwasser per day.
- KS250 — the largest chamber in the KS line, built for reef systems with the highest daily kalkwasser demand.
Setup Tips
- Dose top-off water through the reactor as part of your auto top-off system for consistent, hands-off kalkwasser dosing.
- Refill calcium hydroxide powder regularly rather than letting the chamber run low.
- Monitor pH response when first dialing in dosing rate, since kalkwasser raises pH as it supplies calcium and alkalinity.
The Reef Octopus KS Kalkwasser Reactor line is available at Marine Concept Supply — order online or pick up at our shop in Wheeling, IL. Shop KS100, KS150, or KS250, and browse more reactors.
