Plant problem help plz:)

Hey guys, a few days ago ice plant 2 weeks in veg with half strenght nutrient of ionic grow , its growing hydro (dwc) room temp varies from 75-82f with low humidity (i will purchase humidifier soon),ph levels 5.8 &nbsp;and about 4 days ago it start having these dark grey/brown spot on the 1st lower leaft after to the second and slowly going up ive noticed can anyone tell me what it could be and how i would be able to fix it? Any advise is appreciated thx&nbsp;<img src="https://www.rollitup.org/images/smilies/icon_lol.gif" border="0" alt="" title="Laughing" smilieid="178" class="inlineimg"><img src="https://www.rollitup.org/images/smilies/weed.gif" border="0" alt="" title="Weed Leaf" smilieid="213" class="inlineimg"><img src="https://www.rollitup.org/images/smilies/weed.gif" border="0" alt="" title="Weed Leaf" smilieid="213" class="inlineimg"><br><br>(few pics)&nbsp;<img src="https://www.rollitup.org/attachment.php?attachmentid=2979063&amp;stc=1" attachmentid="2979063" alt="" id="vbattach_2979063" class="previewthumb"><img src="https://www.rollitup.org/attachment.php?attachmentid=2979064&amp;stc=1" attachmentid="2979064" alt="" id="vbattach_2979064" class="previewthumb"><img src="https://www.rollitup.org/attachment.php?attachmentid=2979066&amp;stc=1" attachmentid="2979066" alt="" id="vbattach_2979066" class="previewthumb">

Hey guys, a few days ago ice plant 2 weeks in veg with half strenght nutrient of ionic grow , its growing hydro (dwc) room temp varies from 75-82f with low humidity (i will purchase humidifier soon),ph levels 5.8 &nbsp;and about 4 days ago it start having these dark grey/brown spot on the 1st lower leaft after to the second and slowly going up ive noticed can anyone tell me what it could be and how i would be able to fix it? Any advise is appreciated

Leave a dish of water in there to raise Rh. keep a small fan oin there as plants breathe too, and Flush with 3 times the volume of the pot, with air temperate Ph neutral water, allow to recover in dim light, one day or overnight......avoid feeding for 2 weeks then resume at half the current rate only resume, when you see a positive improvement

Hey vosky if you look at the pic with the full plant youll c on the side theres 2 big tupnoweara with water in since unfortunatly didnt change my rh much and by flush 3x what do you mean exactly ? Its hydro i think its a magnese deffiency or calcium but not sure if any1 has some supp nutes they can refer or anything would be nice thx