Any and all sand placed i nthe tank will become LIVE so the Sand and crushed coral mix and Live sand and crushed coral mix is the same thing.
For the budget hobbists you should get the bulk of your sand from the home improvment store. Be sure its argonite sand and not silicate based. A simple vinegar test will show this. At the home improvment store a 50lb bag will be less than $10 vs the same amount from a LFS
of that bagged live sand would be over $100. Complement this dry sand with a few lbs of live sand from the LFS
's tanks (if they sell live sand thats not pre bagged) or from a fellow hobbists thats in your area.
Dont buy that prebagged stuff.