It is for a brand new system, so will report on what I find.Not to be a sour plum here but live sand i believe is utter bull. Those bags are stored for months, ever years at a time. The food source for that bacteria dies and so does the bacteria, if you adding that to a established system you will have a spike, its like dropping a bottle of ammonia in your tank as everything in the sand is dead.
I have also notice in the past that the tank stays milky for longer as it was not rinsed off. Rinsing it defines the purpose why you bought it. If the system still need to go through it cycle then yes you can use it but to be frank, you were better off buying normal aragonite, rinse it well and add to the system
I have not purchased and Live rock as yet.Ok cool, starting it on a fresh system is fine, just not on a established system.
Is the live rock cured rock (bought from a fellow reefer that was selling and was running in a system) or bought from a LFS (90% of the time not cured rock as they frequently bring in rock)
If not cured buy some Seachem Stability and dose accordingly. Dont worry about Special Blend but if you already bought Special Blend then rather use it.