Can someone please tell me wtf is going on with this?

[AussieHobby]

When I put the pest powder on the plants got wet from misbehaving pressure sprayer (nozzle came off) and the second time I said "where the water collects" was from me trying to wash the powder off lol. I don't water the plants normally just the soil and half the time I feed through the catch trays. I know what you mean about the magnifying effect though because on my outdoor plants the sun has burnt leaves through the collected water drops a few times. Although my outdoors are in direct sun and get watered with a garden hose lol

 

[Dabominable]

Ok thanks, have spent the last 3 hours flushing them all. Water took ages to run clear! Also gave them all a good bath and washed the pest powder off. Hopefully this will help. Thanks again

Do NOT dust your plants with that pest powder. Use something more appropriate to treat, green cure, mildew cure, h202 dilution, or a preventative like neem or neem cake. As far as the fungus gnats/soil mites - You can purchase a mosquito killing bacterium called "MicrobeLif bmc. Its all biological, only need a few drops per gallon, and its cheap, as well as goes a ridiculously long way. I don't think i could use it in a year if i used 10 drops a day, but i only watered with it once, had pretty bad gnats, and have 0 now after drenching. Its been weeks, haven't seen any signs of their kind.