one thing i noticed is you said you were using GH but only the micro and bloom but the GH is a 3 part nutrient system, meaning you use the grow in flower also just a low amount compared to the bloom during its flower stage. so if you were thats say doing 10ml of bloom you would have 5ml of Grow...
I wanted to say hello, Im a long time grower and the sales executive for Dutch Master Nutrients. I love all things with weed and growing weed lol. Say whats up and if you're a experienced grower let me know. I've been working with lots of 502s in Washington st, Colorado, Oregon and others.
Yes from what I'm seeing it looks like you have multiple small issues. Your plant is lacking Calmag, also that fan is too much for those small plants. With the ends of your leafs in some pictures curling down is due to too much saturation. Feed lightly for a week and add some calmag and see if...