Is this common in a new tank

[BryanCaruso]

So I did my bi monthly water change last night was actually 30% a little more then I planed. Water tested this morning and 1.025 calcium 450 and dkh 10.9. So I will try to keep the alkalinity stable for these next two weeks. I picked up 3 more sps frags so hopefully they will start using up the calcium and then run my kalk as top off