yeah if your feeding every water your over feeding you should only feed once a week straight water there after till the next feed day .. but honestly it could be a genetics issue are you seeing it on every leaf stage? like on every internode set do you see another leaf with the same issues? i can see your leafe tacoing from over feeding so i would slow on the feed for sure but pay attention to seeing that same thing on other leaves..
darker leaves don't always mean nitrogen toxicity. you'd have to be adding a lot of excessive nitrogen. leave colors can very a lot my TH seeds dark star leaves are dark green when my Blue hash plant hash very light color .. but your right he's over feeding.
