Discoloration on new leaves. Currently having 2 plants and use the exact same nutrients for both. One of the is growing just fine but the other has these spots everywhere on new leaves
That looks similar to a potassium deficiency.
https://420life.com/wp-content/uploads/2021/10/Marijuana-Leaf-Deficiency-Chart-scaled.jpg
Without a diary it's kind of hard to tell for sure though.