There have been localized blue-green algae blooms in certain parts of Candlewood Lake this summer.  People are reminded not to swim in water with a bloom, and not to let pets swim in those areas either. While every bloom is not necessarily dangerous, the Candlewood Lake Authority says they could release toxins and pose a hazard of respiratory illness, skin irritation, and gastrointestinal distress. Green algae, which looks similar, is not considered harmful.