the reason people go bb is so they can direct flow anywhere they want without creating a sand storm in their tank. usually people with sps due this. also another thing with bb tanks is that usually they will not have as many nutrients as one with a sand bed. If u are going to go bb u must have a skimmer its a must. wheres all ur waste gonna go? its gonna go into the water and smell,look nasty. y not just spend the $60 and get a 2" ls bed? dispite the excess and i mean excess nutrients ur gonna have trouble maintaing your ph. your going to be wasting money if u dont get a skimmer.