DWC aero cabinet newb

So I started my first grow couple weeks ago and it's been a rocky road but now I have most things down. I now need desperate help. My ph which I started checking more frequently more recently is always between 6.0 and 6.2 . My ppms right now are roughly 450. My roots are white and not slimey and producing nicely (just some staining where they are sitting in my tub). My setup is like a dwc/aero setup. A tub with mister heads and net pots. I keep my humidity around 50% as often as I can my res temp is always around 66-70 degrees. I recently switched from a flourecent to a g8led 240 light-which I think is amazing. I have a 240 cfm fan running for exhaust and my Temps always stay between 72-77. For nutes I use flora micro and flora grow being as I'm still in veg with 16-8 light schedual. Now my problem is I have brown spotting on my leaves more so on 1 of the 3 plants. But I know since it's my first grow and I started with seeds I have probably stressed these babies a few times from being a newb and learning but now when I thought I got everything down and nute problems solved I see these brown spots everywhere on the one plant and some what appears to be chlorisis on all three plants. They stand healthy but don't seem to be as tall as I know they should be at this point and I really need advice. Also how do I post pictures so I can show you better? Thanks in advance -Oldskool2405
 
heya,
for your deficiency problems you could take a look at >this blog post about deficiencys< which gives pretty nice examples about several deficiencys.

you might check out my grow journal linked in my sig as well, i had some brown spots on the leaves and some ongoing bleaching, around 08-11 and had some pics where you can see those brown parts, it might be the same, though your ph seems more of an issue to me as some stuff not longer available in that range could cause your symptoms ... so you want to start with a slightly lower ph to have the whole spectrum of nutes available at some point.
pH_chart7.jpg



and for the last this is the guide for uploading pictures ... because with some pics of course everything will be much easier to identify :)
 
Thanks mokel it's hard being a newb not many want to help and I understand but you may have she'd some light(no pun intended) lol on the ph problem for me . I will try to post pics but don't know how to find my own thread when I go to logon only found this cuz I got a notification via email. Thanks again.
 
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