Yo Ho massproducer,
Your right fungus gnat larvae don't hop, or fly, They are fast crawlers at this point, however once they have pupated into a young adult stage they do, and fly also. There can be a lot of over-lapping of the developement stages which can allow you to see all stages at once, some of them jumping, flying, crawling, etc. etc.
For you potplusguitar,
"Springtails are minute, wingless insects about 1/10-inch long and vary in color from black to gray to white. They are found in dark, damp areas and in soils high in organic matter. Some species occasionally feed on living plant tissue such as sprouting seed, roots and tender shoots. Large concentrations of springtails often are found floating in water reservoirs or on the soil surface. They are very mobile and can be found crawling on plants, pots and tables. Literally thousands may be found in sand, gravel or other materials in propagation beds or plant trays. Control springtails by treating benches, shelves or the soil beneath greenhouse benches. Insecticide may need to be applied to the outside of pots and saucers and to the soil surface of potted plants when heavy infestations occur."
My recommendation would be to consider Diatomaceous Earth to break up the life cycle, and see if this helps you to get a grip on these critters lest they do any harm.
I'm certain you will get the upper hand, good luck friend.
smoke in peace
KingKahuuna
