I heard you can use a dishsoap and water mixture and spray on the plants.. but i'm not sure if that's healthy for a chameleon. I have little black flies all over my house from the potted plants.
Just make sure not to use the insecticidal soap if you’re bioactive or free range your feeders, or just don’t use it at all
With all respect to you, don’t you think if someone was having problems with them, that they’d want them gone completely?With respect DGray, the question was how to control them, not eliminate them. I’ve found traps to be pretty effective. I don’t believe it’s possible to truly eliminate them but I have never heard of that interesting bacterial product.
Does this work on bioactive vivs- will it kill my clean up crew?One can not eliminate fungus gnats (or shore flies) with soap, sand, nor traps. The larvae live deep in the soil. Adults often breed at the soil surface and never take flight. They can breed in the soil at the bottom of the pot, so sand is ineffective. Traps only monitor a tiny fraction of the whole population, the traps don't catch all the adults, but they are a useful tool in monitoring. Sticky traps could potentially be a danger to animals.
A soil drench with the proper strain of the bacterium B.t.i. will safely control them. "Mosquito Bits" from Summit is one example. (summitchemical.com) This product is certified organic.
One makes a solution by soaking a quarter of an 8 oz. bottle in a gallon of water for 15 min. and then thoroughly drenching the plant so water comes out all the holes. A treatment usually lasts for about 6 months.
I second the use of carnivorous plants for snaring any stray, pesky bugs! Since our cham rooms are typically pretty humid, they often do well as long as they receive enough light to thrive. I keep a carnivorous bog garden in a half-whiskey barrel on my back porch in Minnesota and even I have pretty good luck with them (when it's not the cold half of the year).There are some beneficial nematodes that will kill fungus gnats in the soil. Amazon and some gardening companies will send them to you. Rehydrate them and drench the soil. Sticky yellow traps can get some of the flying adults or even more satisfying use carnivorous plants near your cages..