Lake Cowichan’s Bob Crandall has spent years helping to protect the fish populations in the Cowichan watershed. Now, the president of the Cowichan Lake Salmonid Enhancement Society and Hatchery says he is becoming increasingly troubled by a seemingly harmless summertime activity: children catching small fish with butterfly nets repurposed as fish nets. Crandall wants shop owners selling the nets to provide buyers with an application for a Depart…