crusty rusty/brown leaves dinafem auto cheese

hi can sum1 help plz 1000watt hps water farm/hydro 1.8 ec, 5.2/5.7 ph, max 80 min 72 temps humidity 30 min 45 max she is nearly six weeks 5 days under the hps i vegged her under 150 watt blue spectrum cfl as you can see she is very short?? however that is not my main issue the reason i am messaging you is for the rusty browning clawing crispy fan leaves not sure if its a nitrogen deficiency or a few deficiencies. when i put her under the hps for flowering i changed my tank to flowering nutrients and gave everything a good cleaning the roots were all white no signs of rot. what can i do to sort the problem?? peaceout [video=youtube_share;7p2Kvd2_03I]http://youtu.be/7p2Kvd2_03I[/video]

Hope this can help you out.

thanks bud. and i believe its a magnesium deficiency thats a great help and chart .peaceout