Assuming that you were using a reef safe sand that did not contain metal, etc. the washing is not that big of deal. You want to get the worst of the dust out, but do not want to lose all of the fine particles. Yours should be fine. I would recommend topping off with some live sand. It doesn't have to be a lot, if it is good stuff. Also adding ifauna kits helps to develop the bed much more quickly. You can never get too many critters in the DSB. Good luck.