(Vancouver, WA) -- Potentially toxic algae has been a problem in Vancouver Lake. Clark County hired a company to distribute an aquatic algaecide to the water in the swim area which will reduce algae. The algaecide was sprayed on the water Thursday morning by boat. It targets algae cells and then breaks down into water and oxygen. There is not a risk to people, pets or other wildlife. The county is advising people against swimming until the water is tested.