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Kalk Stirrer
Kalk Stirrer
Kalk Stirrer

Kalk Stirrer

30 reviews
$ 249.99

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. The simple top loading 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 stirrer 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 Manual

Customer Reviews
4.9 Based on 30 Reviews
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Ross S.
United States United States
Absolutely the way to go!

This kalkwasser reactor is hands down the best. Continuous mixing and gravity fed makes it a breeze to set up. Highly recommended A+

Osvaldo L.
United States United States

I already have the smaller version of this one and I can be more happy , the quality is supremely and they way it works is even better. I purchased my second unit for my way bigger tank and again am extremely happy with the quality. The delivery Was super fast to my house. Definitely is my only brand for kalkwaser reactors. You yes you new customers trust me you can buy with confidence and am not getting paid for saying what I feel about this products. I trust Avast Marine

Douglas R.
United States United States
High Marks for these guys

Their customer support is just like the products they build…. Stellar

Avast Marine Works Kalk Stirrer Review
Robert N.
United States United States

Works as advertised. Easy to setup. I wish I would have purchased sooner in my reefing experience.

abulrahman b.
United States United States
Solid and great

Every thing is awesome