I'm at the point where i need to select a sand for my build. I initially intended to go with fiji pink, but I'm told that a build where there is high flow, would have issues with this fine grade of sand. So i started looking at the carrib-sea special grade dry sand in the 40 pound bags, but I've read in a couple of places that it also can get blown around and form dunes and the such. I then read about the tropic eden reef flakes, and they look promising, but at a higher price point. I hope to have LSP and SPS corals at some point, and while I'd like to save some money on this, I'd rather not introduce a headache by going with too fine a grade of sand. What are your collective experiences with these products, and am i putting too much thought into this?