Problems with leaves, Nitrogen? Overwatering?

heya! That would be nute burn sir! That would be represented by the burned tips on the leaves and the nitrogen toxicity is shown from the leaves dark green and clawing at the tips. I see you fed at the same ppm as last week, check your run-off ppm value and see how close it is to your input ppm. You most likely have a salt build up and needs to be flushed. When the soil is dry enough to water again, flush it with pH water until your ppm is lowered to the desired level and resume as normal. You mentioned over watering, some leaves are drooping a little, could be from the excess nutrients or a little bit of over watering. Just make sure the top two inches are dry before watering again. Good luck!