hey man i remember during my first grow ever i brought some bagged 50L soil from bunnings wearhouse and didnt realise i was awaking a nightmare 2 weeks from than the eggs hatched haha i tried everything haha vinigar in a jar, hanging fly traps for those olympic gnats, tried garlic nothing was working, so did my research and found
neem oil, mixed with some water you spray your plants from top to bottom and under the leafs and hit 10cm deep of your soils, spray the water wells they sit in and the outside of the pot, be like happy gilmore when he see a golfball.
do this once a week for 2-3 weeks
what it does, it coats your plants in the oil, the gnars bite away and get choked the fk out like john jones did to people.
from that day onwards mix the
neem oil through your soil before you use it :)