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Tiny Brown Insects on Ficus Bonsai Soil: Springtails or Mites?

Small (1–2 mm) brown/off-white insects on Ficus soil; fast crawling, no wings, not on leaves. Not springtails (don't jump), not spider mites (red, on leaves).

Possibilities

Soil mites (Oribatida): Beneficial decomposers.
Fungus gnat larvae: But usually fly.
Root aphids: Cottony on roots.

Action

Try neem oil soil drench.
Repot with fresh soil if persistent.
Post photo on Learning2Bonsai for ID.

Most soil fauna harmless; monitor plant health.

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