Hi
@Raaneal! You're having a thrips invasion, I think I can even see one of those bastards on your picture #2. They are tiny insects that suck the nutrients out or your leaves, they hide below the leaves and everywhere they can, and reproduce very quickly in hot environment. The best solution I found so far is using neem-oil mixed with water, and spray this foliar solution at night when the lights are off. Remember to spray above and below the leaves. Your local growshop or your local garden store should have pure neem-oil for you, you'll just have to mix a few drops with non-calcareous water (I usually use 10 to 15 drops for 1L of solution). Hope this helps, keeps us up-to-date, and happy growing 👊