Back from tahoe and SHIT!!!

Hello everyone I got back from Tahoe and my plants look like they have been taking a beating.I added 5ml of flora nectar per gallon with my 3 part series and looks like my plants didn't like it. I run a DWC system that is running 24/7. I have a 4 x 4 x 7 tent and the plants are in there 6th week of vegetative growth. In the first picture, there is an eaten leaf with white stuff on the leaves. The white stuff made the leaves stick together. And the other pictures show what look like a nutrient problem. I instantly changed the reservoir with a 75% 12-8-3 GH flora series. I am planning on spraying the plants down with Einstein neem oil today. anyone know whats going on I dont see any bugs anywhere with a 20x micro please help!!! Also can I spray the hydroton n medium with the neem oil?

DO NOT get neem oil on your hydroton! Sorry you had this mishap bra. Looks like a caterpiller ate that leaf! Be 100% sure you have mites before you use that neem oil.

there r some cobb web kind of white crap with little eggs it looks like. I am pretty sure, but I dont have a microscope big enough for that.