It will destroy an Aqualifter, but not a regular pump if the kalk reactor is designed correctly.
I agree with Bill that dripping is probably the best method. I don't do it because I don't feel like turning it on and off at night, as sad as that is. :lol: With the ATO, if you want to use an aqualifter, the way I did it and the best way to do it is to have the Aqualifter pull freshwater out of your top of reservoir and push it into the bottom of your kalk reactor. The water will then come out of the top of the reactor nice and saturated.

Also, doing it like this the Aqualifter will never have to deal with kalkwasser. It will only be pushing RO/DI water. I've had mine running like this for about a year and a half. The other great thing about the Aqualifters is that they won't back siphon, either.
I have a Mag 2 to mix my kalk up for one minute every 3 hours to keep everything mixed up... easy as pie. Not quite as consistent as a drip, but less maintenance and almost fully automated. The only thing I have to do is replace the kalk once every 2 months or so.
Not everyone has a nice tank room behind their tank like Bill... but you do, Michael, so maybe the kalk drip won't matter as much.
Brandon