 Mosquito dunks are available at garden centers, hardware stores, and online. Visit summitresponsiblesolutions.com. If you're considering remodeling your basement, you need controlled ventilation to exchange the air you breathe. You should do what one of my listeners did and get an EasyBreathe ventilation system. Donald Dimion in Pennsylvania wrote, we were so surprised at how quickly the EasyBreathe improved our air quality.