Substrate size

[Starry]

Whats the consensus on live sand for both sps and sand dwellers, is Caribsea Ocean Direct Original Grade to fine? (snow storm) or should I go with the Caribsea Arag-Alive Special Grade Reef Sand? Plan on running a 3" sand bed and have my heart set on a pearly jawfish,as well as a few other sand dwellers.
Flow will be 800 gph return, 2 mp40's and 4 mj 1200 with Hydor-Flo attachments. Will be running a dsb of 6" in my fuge if that matters.