HELP! Mysterious black/brown blotches on my 2 week old seedling!

Hi guys, I planted these super lemon haze seeds about a week and a half ago, the first symptom was the cotyledons yellowing within their first week of life. The next thing to happen was the leaf tips on one of them started curling downward, I took this as a sign of overwatering and cut back on the water. 3 days later, and I get this:






I dont have a thermometer so I can't be sure of the temperature in the grow room, but it is prolly a bit on the cool side, maybe as low as 60deg. My month old had started to exhibit symptoms as well but I miscalculated the PH adjustment and ended up burning her.

This is my first grow and I'm trying to feel my way through these early problems, but I really need some advice here.

I can toss a picture up of the soil I'm using if need be, I don't think that is the issue though.

HELP!

BUMP - the black is spreading fast - please help guys!

Bump again, no idea's from any of you pros out there? Shit's weak guys.

I think I was having a Mg deficiency due to basic water - I PH'ed my tap water at about 7.5, so I went out and bought some bottled water - added a bit of B12 and transplanted my lil guy to a new pot, hopefully that clears it up.

Wow those are some stretched out seedlings those are probably the same size as mine but mine have like 5 sets of leaves, you should move your light closer as for the black spots I have never heard of that are you sure that its not brown? Also your soil wouldn't happen to be mirical grow would it?

those are dead sorry dude

sk8disgruntled said:

those are dead sorry dude

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They are some pretty haggard plants but with rock they could be saved.

They're dry as FAWK water them immediately. Start there and look for improvement. Also, what kind of light are you using? Water it and collect some runoff, PH test it to see what your medium is running.

i think your fucked. i see so many things wrong in your picture s im not even gonna bother listing them. consider this a learning experience. im sure they are dead by now, so spend a couple months doing research. buy a book and some magazines learn as much as you can, then try again. good luck man