Best way to remove detritus but not time for water change.

I recently replaced a huge volume of water on my 20 gallon lps reef. Siphoned out the sandbed to go BB for awhile, the problem is that there is still trace amounts of sand that have lots of detritus building on it. Should i siphon it out into my sump filter sock to create a continuous "mechanical filter" or just siphon it out fully and do another small wc?