please help diagnose prob!!

Hello guys I'm growing in Deepwater culture this is my 2nd grow and I can figure this problem out I'm thinking it's possible broad mites but I need opinions I'm using gh flora series 2 part my plants that are in flower are really yellowing up at week 4 and my plants in veg goy strange holes n a weird color my pH is between 5.8 and 6.3 anything helps guys

Have you checked your roots? What's your water temps?

My roots look clean my water temp is normal I honestly feel like it broad mites some of my new growth are coming in with burnt tips idk I can't find any pests @THCBrain

Bump here's a pik of new growth damage

Here's more piks