Time is your greatest ally in this situation, since you have a filter sock and hopefully the right filtration in place? If you do, then just wait. Even though there are chemical solutions to make this happen in an hour or two, your best option is to wait. Patience, really is a virtue.
Yeah our sump is going with sock and skimmer. We dosed it with stability this morning. The sand we used is the fine sand also so I'm sure that makes it take longer. And patients your asking for a lot aren't you???...... Lol!!