Awesome links TLD. Loaded with good info. I am thinking about doing a gnat trap, sticky traps( i Have thee), and the sand on the soil. Also Im going to clean the room well after applying all to get rid of them. I have had good results battling the gnats and they are not a serious problem and hope they arent. I would like to try and get them once and for all.
By the way I was transplanting the other day and found a warm in one of my plant pots? A big old earthworm. Came in soil or Earthworm Castings? I left him there.