Yellow spots on leaves in veg stage

To me, it looks like you have an issue with some leaf-sucking insects... the spots are not large nor roundish which would be seen if this was a nute problem. Do the spots themselves get bigger? If so, then yes, it's a nute problem... if not, then it's an insect problem. For that I would grabe some Dr. Zymes Eliminator or some Spinosad and use as directed spraying just before lights out... I'd also tell you to start a diary - that will give us all the information we need to help you when other problems/issues/questions arise. Good luck!

Hey! It seems to be a little excess of Ca or Mg. Maybe you should try using filtered or reverse osmosis water to avoid it. I had exactly the same problem at the beginning of my grow and it has been fixed thanks to this. Bless