Oolite Substrate Question

[Reef23]

Im upgrading from my current 75 to a custom 140G and am a little confused with what substrate works best with SSB. I'm only planning on running a 1"-1.5" bed. When I set my 75G up I always read that larger substrate such as crushed coral was the way to go for an SSB. Seems now when I read people say that crushed coral harbors all the nitrates. Is fine sand the way to go? I can get a great deal on Caribsea Arag-Alive Bahamas Oolite Substrate. Has anyone used this for there DT ?
Thanks