first grow question

i started growing about a month ago and so far my plants seem to be happy. one my obvious problems is this recent ant/gnat infection. its not to bad now but how do i safely get rid of the little f*ckers? im thinking about using little ant traps that raid sells and maybe a block of cedar. any suggestions?

also, what would be a good dehumidifier for a 160 sq ft closet? ive seen many to big, small, expensive, cheap, whatevr. maybe one that might clean my air too.

thank you for your help.http://boards.cannabis.com/images/smilies/smokin.gif