WTF is wrong with these??

Well the plants are like 6 weeks into veg and its also starting on some of the younger ones as well. The leafs were a yellow colour and i was told it was a mag dificency so i added epsom salts and now my plats are getting brown spots in them as well. WTF is wrong here. I cant add pics so i can only use photobucket!! Thanks
http://s394.photobucket.com/albums/pp28/sub-rock/mary%20jane/?action=view&current=DSC03909.jpg&newest=1
http://s394.photobucket.com/albums/pp28/sub-rock/mary jane/?action=view&current=DSC03910.jpg&newest=1
http://s394.photobucket.com/albums/pp28/sub-rock/mary jane/?action=view&current=DSC03911.jpg&newest=1
http://s394.photobucket.com/albums/pp28/sub-rock/mary jane/?action=view&current=DSC03913.jpg&newest=1
http://s394.photobucket.com/albums/pp28/sub-rock/mary jane/?action=view&current=DSC03914.jpg&newest=1
http://s394.photobucket.com/albums/pp28/sub-rock/mary jane/?action=view&current=DSC03915.jpg&newest=1
http://s394.photobucket.com/albums/pp28/sub-rock/mary jane/?action=view&current=DSC03912.jpg&newest=1

so 46 veiws and its been over 24 hours and no reply.....i thought we had expert growers on here with knowledge but where is that??? Thanks

well first if your 6 weeks into veg u should just now have started a feeding program most dirt has enough food in it to last up to 2 months i would flush with plain water looks like your in 3 gal buckets so flush each plant with bout 9 gallons then give them a few days youll see results good luck. ? how often r u feeding what kind and what type of light r u using

What about nutes? R u adding any to that soil?

im using some hydroponic store brand grow nutes. Its 2 parts and there is no NPK ratio on the label. I called the dude and he stated that everything i need is in it. Whats a great nute that i can get for veg and then flower? Im also in Canada and would like to get these locally. What about Advanced Nutrients...are they any good? Im watering about every 3 days as well!! I statred these nutes about 4 weeks into veg!! Ive also tried some epsom salts as well. Also im using a 600 watt HPS aircolled light and im getting another 600 watter for flower!! Thaks

Your ph is off. Check the ph of the run off.
You may want to pick up some lime and add it
to the soil, I have a feeling thats its going to be
on the low side. Same thing happened to me a few
weeks ago.

i just flushed them all with phed water and now im going to see what happens. Thanks