If i was you , i would give up in kalk stirrer , short story ......make more harm then help.
Pro.
Increase Ph , you can do that in many ways. reduce CO2 in yor tank....etc.
Cons.
You , may deals months or years to decrees Ca in, your tank, depend how many Lb. Live Rocks you have., damage most of pumps.
Increase Alk. and Ca. hard to have easy balance.
Best,
Calcium Reactor.
Not , every SPS or LPS love Kalka, hard to competence the evaporation water , is a mess in my opinion.
I try many years , i give up.
I use ...one of the "Best" .....Deltec 500