For Dibble I use ReptiCal (I think you can pick it up at pretty much any pet store). Usually just get a pinch and mix it up really good with the food. I've been doing it every day of the week, and will probably drop off to about ~3-4 times a week once he's 4 years old (as Cubans seem to grow a little slower than Greens do). You could probably drop it down to fewer days at ~2-2 1/2 years old.
You may also want to supplement a multivitamin. I crushed up Centrum tablets and just add another pinch in along with the calcium supplements about ~4 times a week. This will drop down to ~2 times a week at 4 years.
Just be careful about over doing it, as too much calcium is just as bad as not enough.