Answer: Based on your description this sounds like a problem with fungus gnats. These flying pests breed in damp soil and tend to occur when soil is kept overly wet. Allow the soil surface to dry completely between waterings and they should stop within a week or two. You can place a layer of gravel or coarse sand on the soil surface, this fast draining layer will dry quickly and also deter them. Hens and chicks need a well drained soil and are susceptible to root problems if overwatered, so allowing the soil to dry between waterings would be helpful to your plants as well. You can treat them using a soil drench such as Gnatrol, but following the above steps should do the job.
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