same strain some thick roots,some thin roots????

i am cloning blue dream and some have nice thick roots and some have wimpy thin roots....whats up with that??

Your thicker roots probably developed first. Also your thicker roots will develop thin hair like roots on the side. Do you have pics?

no i dont right now,the thin roots dont look like they are the secondary roots from the main.they are way long

Sounds like normal variation.