I supplement my Sulcatas/Marginated with Mazuri about once a week, sometimes twice a week...here goes:

Sulcata 2 yrs old - 3 pellets 1-2 times a week.
Sulcata 4 yrs old - 5 pellets 1-2 times a week.
Sulcata 2 wks old, half a pellet every 2-3 days
Marginated 1 yr old, 1 pellet 2 times a week.

That may not be exact I mean I don't sit there and count but that's about average. They love Mazuri and it's certainly only a supplement since mine as well have grass, hay, flowers, plants etc.

Hope this helps.