02-23-2011, 12:19 AM
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#89 (permalink)
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Re: MH Vs. HPS Vs. LED Vs. Fluorescent
Yes, bringing in clean plants makes the world of difference!
You can also try watering from the bottom for a while until they all die off and the eggs dry out. 
Bowls of water around infested plants will drown gnats in the night and you'll wake up to find many of them floating in the water the next morning.
Sprinkle a bit of cinnamon on top of the soil, which is a natural anti-fungus agent, and this will help to deter the buggers also.
Sticky tape around plants will help catch the flying ones, as well as misty sprays of dishsoapy water from a spray bottle, will kill them instantly. 
Good luck!
: )
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