3 months ago, I found Nature 2 for sale on ebay at the cost of $15 each. I decided with that water change to use one of them. That was early Jan. Since them I've made the attempt to use a little less dichlor. I still dose after the last use each day. I've never carefully measured that dose but since the last water change I've tried to use 2/3 as much as I normally do.
Now my water looks great. In this 3months I did have one epsisode of cloudy water, but a hit of MPS cleared it right up.
I didn't fool with trying to put the Nature 2 stick inside my filter for fear of it becoming unretrievable, so I just set it in the skimmer basket above the filters.
Has it helped? I think so. Has it caused any problems? Not as far as I know.