HELP w/ Nutrient problems, PH & Mn???

[Classicalboy57]

My PH is around 7.8 or so, is this too high? I fed them some nitrogen last week they really needed it. I read when the PH is too high the Mn (manganese) can get locked out. Which is what im led to beleive right now. The new leaves on the bottom are slightly yellow and the green is kind of bright, healthy looking leaves but bright... What should I feed them, there moving into 4 1/2 weeks of growth, 7-8" tall. 18/6 light, orange bud. Thanks everyone, hope you can help :)

[Classicalboy57]

http://img.photobucket.com/albums/v138/Supercharger/rrrrrrr.jpg
http://img.photobucket.com/albums/v138/Supercharger/rrr.jpg

[Classicalboy57]

One more question. My soil is organic, its shrunk down about 1-2" Should I flush this soil or repot them? There in 9" pots 2 Gallon I beleive. These are big enough right?

:D

[notanovice]

i dont grow in soil but, i think you need to airriate the soil, your roots need some oxygen,
sounds like your soil is compacted tightly and may cause your plants some problems down the road.
ph is a bit high too,

[Classicalboy57]

Thanks, I'll airriate for starters. Definately need to bring the PH down. I know what to use but how much. Should I pre-mix it in a gallon of water to a certain level? I have a PH meter, so if the current PH is now around 7.8 or so, would I make a solution of for example 6.0? Or does it work differently?

[Classicalboy57]

I broke up the soil trying not to hit any roots, looks alright. My tallest one has purple-ish lines up the base, and a stem or 2 for the leaves are purple-ish. Im gonna read up on this! Any help would be appreciated.