2.12 Plants look really nice, started to bring up the EC just now. Managed to raise leds just a little bit higher, still a bit close for my liking but we will see ;)
7.12 Made new nutrient waters with 2ml of A+B, ran out of Cannazym just now.
Bro, dark green leaves may be a sign of phosphorus deficiency, and yellowing of the tips is a sign of potassium deficiency. In my opinion, it is more likely at this stage of flowering.