Kalkwasser Reactor (3 models available)

A Reactor built for Professionals, by Professionals.”

Model No.: KS-100, KS-150, KS-250

Features & Benefits

  • Raise or stabilize PH
  • Silent operation
  • Solid construction
  • High Torque-low RPM moter
  • Quick connect fittings


Reef Octopus Kalk Stirrer (Nilsen Reactor) carries a high torque low RPM motor that effectively, silently and gently mixes your calcium hydroxide (Kalkwasser). This method is not only ideal but is also the safest way of dosing the freshest possible Kalkwasser to your reef system. The Reef Octopus Kalk Stirrer is designed to keep the undissolved particles at the bottom of the reactor chamber while always leaving the clear highly saturated Kalkwasser liquid at the top. Adding Kalk powder couldn’t be easier with just a few twists of the large thumb screws releasing the seal-tight lid for quick and easy Kalk refills.

No need for powerheads that randomly need to be cleaned or replace and no more risky dosing with large vats of lime water which take up valuable space. You will never have to worry about premixing or clogs again when using our new innovative and efficient Kalk Stirrer (Nilsen Reactor) which are extremely easy to use and salt-water safe, making them simply the most economical and best Kalk reactor out there.

*The Kalk Stirrer uses a motor that has a lifetime of about 1500 hours. Please don’t run unit continuously.

What's included

Article CodeItemsKS-100Article CodeItemsKS-150Article CodeItemsKS-250
Model NO.QtyModel No.QtyModel No.Qty
1Top Cover11Screw M8*1211Screw M8*121
2O Ring12Isolation Cover12Isolation Cover1
3Isolation cover13Install pile13Install pile1
4Capacitor14O Ring14O Ring1
5O Ring15Install chassis15Install chassis1
6Install chassis16Screw M8*2566Screw M8*2512
7Screw M8*2567Cover of body17Cover of body1
8Cover of body18Pin & clasp18Pin & clasp1
10Screw M4*11410Screw M4*11510Screw M4*115
12Pin & clasp112Transformer112Transformer1
13O Ring113O Ring113O Ring1
14Screw M8*15314Screw M8*15314Screw M8*233
15Axis of rotation115Axis of rotation115Axis of rotation1
16Screw M8*32116Screw M8*32116Screw M8*321
17Stirrer arm117Stirrer arm117Stirrer arm1
19Water inlet hose119Water inlet hose119Water inlet hose1
20Water outlet hose120Water outlet hose120Water outlet hose1

Technical Data

ProductWet/DryDiameterFootprintHeightQuick Connect Input and Output


ProductCalcium HydroxideTank VolumeFeeding Pump Suggestion
gramLUS GalL/HGph

Explosion Charts

Explosion Chart for KS-100

Explosion Chart for KS-100

Explosion Chart for KS-150/KS-250


Explosion Chart for KS-150 KS-250