You're going to get allot of different answers, i know i did when i asked this question.
But majority of members use Rep-Cal w/ and w/out D3 and Rep-Cal Herptivite Multivitamin.
My Schedule (Baby - Sub-Adult):
Everyday - Rep-Cal Calcium WITHOUT D3
First Sunday of the month - Calcium WITH D3
Second Sunday of the month - Herptivite Multivitamin
Third Sunday of the month - Calcium WITH D3
Forth Sunday of the month - Herptivite Multivitamin
I alternate the Herptivite Multivitamin and Calcium WITH D3 everyother sundays. It makes it really easy to remember to use the Multivitamin twice a month and the calcium with D3 twice a month. Just make sure your replacing one of the two with the calcium w/out D3.
Schedule (Adults):
EveryOTHER Day - Rep-Cal Calcium WITHOUT D3
First Sunday of the month - Calcium WITH D3
Second Sunday of the month - Herptivite Multivitamin
Third Sunday of the month - Calcium WITH D3
Forth Sunday of the month - Herptivite Multivitamin
It's recommended not to feed your cham everyday when he's an adult. They can get overweight!
Hope this helped