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Kalk Stirrer Kit
Kalk Stirrer Kit
Kalk Stirrer Kit

Kalk Stirrer Kit

$ 159.99

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.

 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

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Christopher W.
United States

Extremely happy with my Avast Marine products

Avast has always had the top notch products and customer support. For any of your reef tank equipment needs, do not hesitate, and use Avast Marine! You will not be disappointed!

Chris C.
United States

Two thumbs up!

Had some issues building it, I did not use enough glue. Was a easy fix and had it up and running in no time. My PH is now always above 8.0. Very happy with it.

A Avast Marine Works Customer
Nghia H.
United States

Great products and service!

The Kalk K2 Stirrer was easy to assemble and works great. Can’t go wrong with Avast products. Their customer support is also fantastic, replies same day on and off normal business hours.

Clarence B.
United States

Kalk Stirrer

Good product. The build instructions were excellent. The motor is very quiet and I'm getting good results in my aquarium. The Ph is much improved and I have a clean top off reservoir that isn't full of messy Kalkwasser

Donetta L.
United States


Unit delivered with bad motor great customer service had replacement motor in 4 days. Only issue is stirrer hole larger than supplied making had to keep at correct angle. Mine ended up slightly off, however seem to work OK.