Against pests in your medium, earth, coconut or hydro.
Against the larvae of the fungus gnat, and in the full earth also against the larvae of the chestnut moth, carrots, carrots, centipedes, etc.
Add 5 grams per 10 liters of pot, sprinkle on the earth and then water in,
Or before you fill the pots by mixing the earth / coconut (also 5 grams per 10 liters).
In the case of hydro, hang in the nutrient bar in a nylon stocking.