Well, if it were me, I would remove the filters and just use the flow. The filters are doing the same thing as rinsing the sand. It may take a week or two, but it will settle down and your sandbed will have the potential for a much wider diversity of critters than if the "dust/silt" is removed with filters.
I didn't comment before. but the rock looks great!! As long as we are getting aquacultured rock like that, I see no reason for harvesting "real" LR
from the reefs