White speckles on roots... Aphids?

[MateoinLosAngeles]

Hey all,

I noticed some white speckles on a Phalaenopsis roots potted in semi hydro. After a long and patient staring, I finally saw one of those speckles move.

My first thought was that they might be springtails, as most plants I buy usually come with them. But having springtails in semi hydro seemed odd to me. When trying to "bother" them to see if they'd "spring" they didn't.

The tiny size and white color makes me think these are either Aphid or Thrip larvae or nymphs? I've been inspecting my other plants and I could only see another Phal with them on the roots, this one also had a stray one on the leaves.

If they are Aphids would it be safe to spray 70% isopropyl alcohol on the roots? Or would that be too damaging?