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Kalk Stirrer Kit
Kalk Stirrer Kit
Kalk Stirrer Kit

Kalk Stirrer Kit

98 reviews
$ 169.99

The new motor driven design of our stirrer silently and gently mixes your calcium hydroxide 24 hours a day. This ensures that you are always dosing the freshest possible kalkwasser to your system. Since the undissolved particles are always kept at the bottom and the clear liquid is always at the top, this is the safest available way to dose kalkwasser. Simple top load design reduces the amount of time spent adding kalk powder to the reactor, which can be refilled in less than 1 minute.

No more powerheads to clean or replace, no more large vats of lime water taking up valuable space next to your tank. Once you try our new line of stirrers you'll never look at kalkwasser the same again.

Note that our stirrers are non-pressurized chambers; water enters through a 1/4" John Guest fitting in the lid and gravity drains out into your sump through the 1/2" union barb fitting in the side. The lid is not fixed in place; it lifts off for quick and easy kalk powder refills.

If you plan to install a kalk stirrer in your auto top-off system, we recommend this small valve to control the output of the pump to a fast drip.  If you have a Tunze ATO, use this fitting to connect their tubing to the pushlock connector on the lid of the stirrer.  Please see the kalk stirrer manual for additional installation tips and ideas.

 Technical Data K1 K2
Tank Rating 400 Gallons 800 Gallons
Output capacity 7 Gallons/day 14 Gallons/day
Footprint 5.5" x 5.5" 7" x 7"
Height 21" 21"
Power AC 120v 3w AC 120v 3w
Warranty 1 year 1 year


Click Here to Download the User Manual

Click Here to Download the Assembly Manual

Customer Reviews
4.9 Based on 98 Reviews
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Filter Reviews:
Jack F.
United States United States
Easy to Build

Great quality and fun and easy to build. Watched the YouTube video and it went together quickly!

Michael L.
United States United States
Great Kalk Reactor!

Item shipped almost immediately and arrived quickly. Building the reactor is very simple with the provided YouTube video. Seems to work flawlessly, just what I needed!

Timothy H.
United States United States
Great product

Went together easily and quickly and keeps kalk additions steady. Bought a second one a couple weeks later to add to my other system. Only recommendation would be to specify which direction to mount the stirrer bar on the k2...just realized I mounted them in opposite directions on the 2 reactors. Not sure if it matters though.

Avast Marine Works Kalk Stirrer Kit Review
Luke F.
United States United States
Assemble Yourself Kalk Stirrer

Easy to put together watching the video. Does what it's supposed to do without issue. Use a check valve with it. First time I used it kalk slurry siphoned back into my ATO container.

United States United States
Avast K1

Product is built tough and was easy to assemble. Product is very user friendly and staff is just as user friendly. Looking forward to my next purchase.

Avast Marine Works Kalk Stirrer Kit Review