Brown spots

Hey guys I was wondering if you guys know what this is. Two of the lower leaves on my diesel ryder has 3 brown spots. Here are some up close pictures. I have a bluelabs ph meter and my runoff ph is about 6.0 is that a bit to low?
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Also here is some pictures of my Afghan kush ryder. It looks a little pale green and droopy leaves. Do you guys think its due to overwatering? I water ever 3 days with about .4L. I am using 3 gallon smart pots.
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Hm after looking at some guides I think it might be a N deficiency or the ph of the soil is off. What do you guys think?

Nitrogen gets absorbed best at that ph in soil so I wouldn't worry about that...
Personally... I know people that use soil (Im strictly hydro) and they PH to 6.3 then let the ph swing up to say 6.8 or as far as 7.

Dont worry to much brother... The plant is in early stages of life... Just figure out your ph situation and I think you'll be fine.

ya they look like they will be fine. you need to try to water by weight not by days. fully water the plant, weigh it by hand. let it get up to 65 70% lighter then water again all the way thru.

Here are some photos of it spreading a bit. The edges by the dead spots are folding down.
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Youre p.h may wanna be a little higher maybe 6.2 : 6.5.... And id probablly wanna have my ppm's at about 400 at that stage....but thats really not too much to worry about itz still eairly....and ive found the less you mess wit em the less you stress em...good luck

codemonkey182 said:

Here are some photos of it spreading a bit. The edges by the dead spots are folding down.
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Click to expand...

Yeeahh.i didnt see this one im leaning twoards a potassiun deffenciey.....or maybe phosphurus ..im.shure itz not nitrogen...or magnesium...im leaning twoard potassium usually with those the leaves will fell britttle and crumble in your hand....check the thread on deffencies.....in marijuana....youll find youre awnser there

I meant marijuana plant problemz..................im high...............very

lol yea thats what I was thinking to. Thanks for the help Ill check out the guide.