:smoking: DG, no need to do that for the gnat's, the larvae can only survive in some sort of medium, not aqueous though,... adults don't really feed, and are little more than flying gonads-
easy kills, stickies can help there too,... Now, I'm not a a hydro' experienced grower, so I'm not sure if Bt (mosquito bits/pucks; Bonide and Summit are the common brands) is a viable option for hydro,... you can get liquid only products, or you can also make a "tea" with the granules which is what I do for soil. (
@NorthernLights_420 )-- For a gallon of tea, I use about a 1/4c of granules, 1fat T of molasses and a dash of nutes for a little quick fuel for them,... drop a little airstone in there for best results, set someplace warm and let brew for a day or so, then treat the pots; a full soaking isn't necessary, for say 3gal pot I put in about 1L,... the bacterium will persist in the soil for a while, but it takes a few days to get busy killin', they must ingest the Bt to become infected,...
@davisgirl 
-- ladies are self-sufficient!
... as a biologist, I find it to be one of the great work-around tricks up Mother Nature's sleeves!
Especially in vertebrates, isolated populations that somehow managed to evolve that trick in quick order to survive,...
.... but for the bugs, like aphids on my plants, I'm not f'ing amused anymore-
Alcohol can work wonders indeed if applied rightly,... one of the home made all purpose vermin blasters we used at the orchid nursery was a blend of Ultrafine horticultural oil, water, wetting agent/dish detergent, and alcohol... Nothing developed resistance to that! You just had to be careful on which species you sprayed, some had leaves that couldn't tolerate it,... but I use it on cannabis for certain application as well,... Otherwise, I've been liking the spinosad containing products for spot-shotting bugs, aphids mainly these days, as the SNS209 repels the rest well enough.... again, that wetting agent plays a big role in cutting through their natural repellancy and getting proper contact with the pesti' solution....
...... I like how you think luv,
clean is mean!
Cheers luv! I battle several vermins growing outdoors,.. it's a war, not a battle- 
... I do get a lot of help from a great product called SNS209, an organic (? -plant based at least) systemic made from rosemaric acid... Fouls the juices so most sap suckers piss off! .... By near harvest time, you stop adding it a couple weeks before to metabolize out,... But some flying aphids still land and immediately start crapping out babies even before they start to feed, so I end up using that spray, or a spinosad spray to blast them- 
