Fungus Gnats - A Common Houseplant Pest
Since there isn't much going on in this forum now, I figured I'd post a few threads about possibly interesting topics.
If you have houseplants and see little gnats flying around your house, you may have fungus gnats. I've particularly found Miracle Grow Potting Soil to commonly be infested with these, even when purchased at various stores. Sometimes I'll open a brand new bag and the little critters fly out. Once they're established, like they quickly become after arriving in a new bag of Miracle Grow Potting Soil, they aren't always that easy to get rid of (at least completely). I've found BT, Knock-Out Gnats from Garden's Alive (yeah, I know, not the best liked vendor out there), to be the most useful thing I've tried, but even it sometimes takes multiple and consistent treatments. Below is a helpful guide to the subject.
Here is a link that might be useful: UC, Davis on Fungus Gnats