So I have been wanting to use sand as my flooring in the coop for a few weeks now and going to try to get stuff done tomorrow. But it really is hard looking for river sand or construction grade that is 'silicate free'- I have no such luck with the internet or even having .5 tons shipped to me. So my question is: what kind of sand do you work with and how did you get it? Would any of the sands from Lowes or Home Depot be good? Would that work for the coop? Any ideas?