Sand/Substrate?

[jostafew]

Like anything in this hobby there is no right answer. The sand you choose should be part of the bigger picture in your tank. If you're doing a lagoon type setup with softies and some LPS then do the sugar sand as it will be better able to act as DSB and will stay put just fine in the lower flow environment. Fine sands will also allow you to keep fish which sift the substrate and burry themselves in it at night (ie Canary wrasse). If you're going more SPS heavy and will have higher flow in the tank then yes, choose a coarser substrate that will not get blown around as much but be aware that you are making tradeoffs to do so.

As for brands, CaribSea is well known. I think that any substrate you choose will cloud the water so if possible add the sand first then fill the tank (not live sand of course, that should go into a pre-filled and pre-salinated tank) and give it a few days to clear up.