The alkalinity is fine. The only issue with the Ca
is if it gets used up at all, it will create an even larger imbalance making it harder to fix as time goes by. If you "tweek" the Ca
a bit with each water change, it will help eliminate the possible problem.
If you have any type of coralline growth I am quite sure both alk
will get used up at least some. With corals, I would actually suggest some sort of suppliment dosed directly to the tank. These levels as they are will be hard to maintain and keep balanced if so.
Keep testing every few days and see what the rate of depletion turns out to be. That will help to detrmine what if anything extra might need to be done.