Here are a few links to some RC threads. I dont usually link another board but though it may offer some good info in this case. There was a lot of them. The last thread has someone posting another view but most agree with what I posted. I also seen a link to an article, which I never read yet.
http://reefcentral.com/forums/showth...water+softener
http://reefcentral.com/forums/showth...water+softener
http://reefcentral.com/forums/showth...water+softener
Hope some of this helps.