Thanks... I was wondering if the coarser sand (with the bigger bits of clams shells) might be too "pokey and stabby."
Since I'll be sifting all the sand anyways, I'll just make sure to use a finer mesh. The wonderful thing(besides the eggs I hope to get) is that the sand and poop when combined with kelp, my kitchen compost, and coffee grounds from a friends coffeehouse will make excellent new soil for my garden!