This is my two cents. The aqualifter will not last very long when used with KALK. Tried this and failed miserable. But with BRS, Alk and Calk, this is different story. I believe Kalk has many residues or solids that go through the aqualifter. And because of this, it will clog the pump and will fail. I will wish you good luck.
If you can use the canister that came with it and remove the filter and use it to filter solids before it goes to the a-pump then it might be possible for it to last long. Use the canister as a mini sump for the alks solid to be trapped in there since the flow inside it is very very slow. it might work.
or if you have a very tall reactor and make sure that the time pump goes on is opposite to the time the pump mixer is on, then it might also work...