I believe this is an egg of some sort. However, I am in no way a professional or even a hobbyist. I have a total of 2 plants. Anyway, can someone please tell me if I need to be concerned about these? They are all in the soil for my houseplants.
There's nothing in the photo to indicate scale but they appear to be slow-release fertilizer pellets. For example, Osmocote.
Maybe. They're very tiny. Smaller or about the same as a bb. When "popped" they just have clear liquid in them. No sign of a "baby" or whatever they are called. And I haven't see signs of any slugs. Even in my yard. The only thing I've ever had issue with are those damn gnats. I purposely bough "gnat control" formula soil this time. I've still seen a few, but much fewer than usual, in there. I thought they might be eggs from the gnats?
I'd go with it being fertilizer. You are over-watering your plants if you're having problems with fungus gnats as they thrive on wet soil conditions. The following thread may be of interest: Fiddle leaf repot. Fungus Gnats Management Guidelines--UC IPM