m0useanswered grow question 3 years ago Best solution I have found for fungus gnats are a product called pod poppers
https://www.amazon.ca/Nema-Globe-Beneficial-Nematodes-S-Feltiae/dp/B01N5TYSFU
They are beneficial nematodes, or microscopic worms that eat the larva of the gnats and end their breeding cycle.
This combined with yellow sticky traps are one hell of a tool set and get rid of them all in 1 week.
Kills them in two places and prevents their return in the medium.
Best of Luck and Happy Growing