Mosquito Beater, Add to Standing Water, 24-Pack, 2-oz.

Doesn't eliminate them entirely but made a noticeable difference in the amount of mosquitoes. Definitely worth it. You must re-treat every month or so if you live somewhere with tropical amounts of rain during the warm seasons like I do or the population will rebound. If you begin your treatment early in the year, as soon as you see the first mosquito and keep it up once a month or so (depending on rainfall) it makes a huge difference.