tiny clear larvae with black heads

iv started noticing some of my clones weren't doing so hot so i started looking and these clear worms are in the bottom of some of the stems they are in multiple strains so i don't thing they are coming from my moms i first thought they were in the soil but i switched from royal gold basement mix to royal gold tupur and I'm still finding them can someone help identify them maybe help me find where they may have come from and how to prevent this pest FullSizeRender.jpg
 
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