i would move it into more flow, not less
well, only reason i wanted to move it into less flow is b/c i've noticed some of my sps not extend their poylps as much since i added the nano streams. seems like they were kinda getting blasted with too much flow.
they were also sitting right in front of the return outlet, which is just a mag 3 though. so they did have some constant flow. but i've never had a problem with any other new frag sitting there having a problem with the flow.