 Mosquito Dunks are available at garden centers, hardware stores, and online. Visit SummitResponsibleSolutions.com. You've heard me talk about Awesome for years, and their fantastic lineup of products has just gotten better. If you own a hot tub, spa, swimming pool, jetted tub, dishwasher, or wash machine, you need to be using one of Awesome's powerful products designed to clean internal plumbing.