Punakaiki residents say they want to be told if chlorine is added to their drinking-water supply, after a tavern owner lost seven goldfish following an alleged sabotage of the local water scheme.
"They were more than belly up," Punakaiki Tavern owner Ian Ryder said of the incident. "It was pretty quick."
The first they knew was when the greenery in the fishpond went white. They then smelled the chlorine, but it was too late for seven of his 80 or so goldfish.
"They put chlorine in without telling anybody," Mr Ryder said.
The Buller District Council had not apologised. Residents asked to be informed if chlorine was added again.