Is it Normal for no ALK/Cal Use in a Week?

[Reefer37]

So I have a year old 45g cube with some LPS and softies. Total maybe 20-25 corals. It's not overly stocked, so maybe this is pretty normal, but I feel there would be some use in my alkalinity or calcium levels.

I checked over a week and looks like no use of any alk or calcium.
Check Alk with Hanna 8.5 and Calcium with Red Sea 425.

Is this normal?

 

[Nick Steele]

How new is the tank. It can take time for a tank to use up enough alk/calc/mag before noticing it. Water changes are enough before this happens

 

[Reefer37]

How new is the tank. It can take time for a tank to use up enough alk/calc/mag before noticing it. Water changes are enough before this happens

It's a year old and yeah very well could be, this is my first reef tank.