You can find a link to some soap in that first link i provided. It's down further past all the pics of aphids on plants. There, it also has other ways to fight aphids, though if you are flowering you really have to be careful. I would research for what is safe to use during flower, but be warned sometimes they actually get into the buds and thats bad. I read an article of a guy who treated his plants, thought they were gone and harvested to find that the aphids were also in the buds as well.