Comment by broguinn

I added 6 mosquitofish to my 110 gallon container pond two months ago. There are now nearly 100 in there, and the mosquito count in my back yard has definitely diminished.

Cool mosquitofish facts:

- An adult female can eat between 300-400 mosquito larvae in a single day.

- They're highly tolerant of low-oxygen and high-temperature water. They're hardy fish.

- They're native to North America, so pose little risk to getting into the water system, as they're already there.

- They're so effective at reducing mosquito populations, some local governments give them out for free.

src: https://en.wikipedia.org/wiki/Mosquitofish