No diary = no information! Most of the photos suggest you may have some insects but the 2nd and 4th photo clearly shows a calcium deficiency on top of the insects (and in order to solve that, you're going to need to know WHY they have it and it kind of looks like it might be a nitrogen toxicity that's causing it - but I'd also need to know what pH you're maintaining). For the insects, get some Dr. Zymes Eliminator or some Spinosad, mix as directed and spray at lights out.
Good luck....