Bombs are for infestations/inaccessible areas.
Try what the pros use for "normal" insect control; Tempo WP, Tempo SC
or Talstar One, applied according to label directions. The cheapest
I've found it is on ebay. I use Tempo WP and Talstar around here.
If there are any feed stores around they sometimes carry Tempo WP in 7
gram packets, but that's kind of the expensive way to get it.
As far as any residual bomb "poison", once it dries there isn't enough
active ingredient left to hurt a fly, but most if not all insecticides
are perilous to aquatic life, so you'll want to throw a towel over any
aquariums and take care to avoid overspray contacting ponds, etc., but
that's all in the label directions.
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