I am getting everything I need to start a reef tank together and recently bought a few bags of CaribSea "Seaflor special grade reef sand" which I planned on using and seeding with live sand. The question I have is the grain size of the caribsea brand is 1.25 to 1.95 mm and was wondering if this is too large a size? What size is most live sand if you mail order it? I dont want to order live sand and it be .1 to .2 mm and just sink to the bottom of the caribsea or does it really matter and I am just paranoid? Thanks...