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pH is much more of a problem than an over abundance of calcium which will just end up binding with carbonates to create calcium carbonate in a reef tank. If there is a kalk incident it is going to drive pH much higher than just 1 point, try about 2 to 2.5 within a few minutes,which is a REAL problem if not corrected. All of us who have kalk reactors have had this issue at one time or another, the best way I know to remedy this situation is to not let it happen in the first place. This means buying a way to control pH in your tank ie, a pH controller or a multi-controller. That is what I did and I have not had any more problems with kalk since, knock on wood.
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