I can tell u off the bat if u are using just to round numbers:
20 ml grow
10 ml micro
3 ml bloom
Thats def not right to begin with. Im not a GH expert and I dont use it but I looked at feed schedule and have used it many moons ago.
It should go something like this:
G-M-B
4-3-1 mid veg
2-2-1 late veg
Also 6.3-6.5 in coco is way too high bud. You should be in the 5.7-5.9 range anything over 6.0 your gonna have issues. Def looks like a Ph problem. The older pics u posted did not look like that. Those rust colored spots between veins and twisted leaf growth is ph all the way. Get the down and youll be seeing difference in no time.
Thats why important post all info sorry gave u wrong info before I based it off what u said and I saw. Those plants arent very big either I'd be trying to stay in the 600-750 ppm range. Should be about 150-200 ppm cal mag the rest base nutrients and try lower that grow down and even out the other stuff.
Maybe 20-15-5 but ask someone else who may be more familiar with how many ppm GH will run might have play w ratios dial it in better.