Help needed please :(

I don't know whats going on but my plant has been into flower just over 3 weeks now, i'v upped her to 2 mils of bio grow and she has been on 1 mil for the last 3 feeds so i though it would be safe to up the dosage however the big fan leaves in the middle of the plant are starting to die off. There are some pics of the fan leaves but as u can see the rest of the plant is doing amazing

any ideas guys?
much appreciated

i agree with Leafpot, seems like its drinking the nutes outta fan leaves, feed her some cleaned zer0'd ppm'd h2o, she should start cruising again.

flush them with plain water and cut back on your nutes..

i dont see how it can b over nutin becoz the yellow started frm the center and not the edges/tips and her last 3 waterings were one mil so surely shed b used to 2 mil
my mate suggested addin bio bloom for next feeb 2 mil 2 mil
ideas?

looks like you might have had a leaf spring up and hit a light there a while ago ..... great advice and comments so far.