Dust with pure calcium every time and dust with a vitamin supplement with D3 once a week or so. Or just use something like Repashy Superfood's ICB... I find that to be the easiest thing to do and have used it for about two years now. Don't forget to leave a small cap with calcium in her tub/tank.
So she can get what she needs whenever she needs it. It doesn't hurt for it to be in there. If she feels like she needs a little extra calcium she'll go lick it.