I pulled a couple plants out of the pots, ones that were almost rootbound. So the roots were easily visible. Using a 4x magnifying glass I noticed about a dozen of what look very similar to the red assed variation. But they didnt' really have a visible red ass, more of a overall goldish color. Also there were ones smaller in size that were closer to white in color. The smaller ones seemed to mover faster then the gold ones.
Yup, those are root aphids, for sure.
The best Bayer, IMO, is the Bayer Advanced, because it has imid for the root aphids, and another contact killer for other stuff.