I have been fighting a hard fight with those lil foggers. i had e waves of them in weekly change I started with Neemoil-Solution. worked for 1 week, then ive bought "nematodes" little worms that eat the larvae in the soil but it was to cold for the Nematodes( Predator). 3.rd step watered with an Bacteria called" BACILUS BRASILIENSIS" . Thats what helped in the End. the product is calledCULINEX Tab plus....Its good to keep the airflow, hanging STICKY Yellowcards and Spray neemoilsoution, keeping the soil dry, putting on the Layer Siliea powder. And if its getting worse, look for Bacilus Brasieliensis. These are all organic solvations against Fungusgnats, does not harm water, plant or us.