New Fairfield has scaled back its plans to add herbicides to Candlewood Lake.  The revised proposal is to add a milfoil killing herbicide to 10 acres at Shelter Harbor Cove, down from 60 acres, and to not use copper sulfate at all.  The Newstimes reports that originally copper sulfate would have been added to 160 acres to treat blue-green algae.  Shoreline residents opposed the initial plan during a public hearing.  More than 26-hundred people signed an online petition against the proposal.  New Fairfield will have to apply to the state Department of Energy and Environmental Protection for a permit.  Some testimony in support of the pilot program by cove residents has already been submitted.