joel.uejio, when I bought my sand, being new I went for what my lfs recommended, and I knew aragonite was good, only issue is the sand is sugar sized. As I got more flow in my tank, I ran into that issue of it blowing around... More research led me to many posts saying carib-sea reef select was the sand to have for reefs as its much bigger grain and almost impossible to blow around... I saw some at one of my lfs's today and its MUCH larger grain... My next setup will use this sand... Just an fyi from what I have seen