[because_789]

Anyone else use mosquito fish? I got some from the pet store, put them in our small koi pond, and the mosquitoes really died off dramatically.

[toast0]

Some vector control programs give out mosquito fish, worth checking in. Where I live, mosquito fish are specifically discouraged in waters that may flow into natural waters because they can feed on native fish and amphibians. Unfortunately, I haven't seen any advice about what native fish I could put in the small, mucky, pond on my land. :( (Kitsap County, WA)

[zokier]

Problem with mosquito fish and other similar biocontrols is that they easily become invasive/noxious and disrupt the ecosystem in unintended ways. So if you plan to use them you need to be careful that they do not escape to nature, and in general it would be preferable to use native species instead