Has anyone started with sand and removed it at a later date? I ask because I just started my RS 300XL with 40lbs of CaribSea Special Grade, and with only 2 Tunze 6045's I have to be very careful of where they are pointed as to not blow sand across the bottom. This is going to be an SPS dominant tank with at least an MP40 added for additional flow. I think I am going to have a hard time keeping the sand bed in place. Especially when frags become colonies and I really need to crank up the flow. If the time comes, what would be the best way to go about removing all my sand?