leaves curling down on veg

Not enough information to go off. Your diary doesn't tell what your feeding the plants and at what strengths, how often, etc. Your diary says your pH is 6.5, but i doubt that based on looking at your plants. Unless you are using REALLY shitty nutrients, i'd say you have a pH problem in your soil. Usually when multiple things are displaying on a plant, that's what it tends to be. Provide much more detail and then it might be easier to pin point a problem. For sure looks like Magnesium deficiency, among other issues. Either nutrient burn or potassium and phosphorous issues. I see all of that in your plants.