Hey friend
So everyone got to pick the nutrients that they like best, so unfortunately not all diaries will be the same even with the same strain. Try going up to 4 ml per litre. If you still feel like it's not getting what it should, then i would do a plain ph'd water flush, just in case of a buildup and then come in with a mild feed watering.
For the most part your plant is looking healthy, so just try some minor adjustments and watch for changes.👍
Good luck on the grow and i hope you'll be puffin in Amsterdam. 😁