i wouldnt use"live sand" it is in a bag with no water, air or temp. control, ive talked to people who haev hjad these bags analized in a lab for bacteria colonys, zero.
dont pay for the expensive aragonite stuff either. In or der for the CACO3 to be dissolved the PH i nthe tank would have to be sooo low nothing could live, it would eat through everythign in the tank(except for glass and silicone)
just buy some quikrete for 3 bucks, or if you can find some, throw in a 50 lb bag of southdown, its this time of yar when it atarts showing up.
i haev 50 LBS southdown in my 29, the storm was bad, but when you fill it up, put a plastuc garbage bag over te sadn and pump water in slowly, we did this in my friends 12 cubwe, worked fine.
just dont disturb the bed fore a few days.