Check this link out and search for slinger on the page:
http://www.atlantareefclub.org/forums/showthread.php?t=107750
Also do a google search for reeflo slinger and click images tab.
Yes you can! My entire sps tank turned pale and lost a lot of polyp extension. I've since set my crazy skimmer to skim super dry. Things responded quickly to the change in a positive way.