your leaf yellowing could just be a normal yellowing for its age and timeframe of flowering...i added AN's Kushie Kush(where t.f. do they come up with these names) and noticed it eliminated the need for calmag with better npk ratios..0-7-17 for kk and 2-0-0 for calmag...i see you have already ordered Calmag but just something to look at...i'm not an AN fan but i do like a few of their products!

your girls look like they are coming along nicely! :thumbsup: