slight yellowing of the leaves?

I'm sure this topic has been discused many times but I'm on my phone so I can't really do a lot of searching. Anyways some of my leaves are yellow along the edges, what do you make of it?

http://i1086.photobucket.com/albums/j447/bennygunz/IMAG0129.jpg?t=1300328490

http://i1086.photobucket.com/albums/j447/bennygunz/IMAG0130.jpg?t=1300328741

http://i1086.photobucket.com/albums/j447/bennygunz/IMAG0132.jpg?t=1300328925

I'm thinking lack of nitrogen but I'm not exactly sure.

if u havent been giving it nutes which i think is the case, give it [grow big] by fox farms!!!!

No I've been using 3 part gh flora

absolutely deficient. notice how it looks like the plants are sucking the nice dark green out of the sides of the leaves? like when a person doesn't eat and gets skinny. feed those things!

I use gh flora 3 part. I think I should up the floramicro

Thanks. I'm def gonna up the micro and see how she reacts. The leaves that are turning yellow, will they ever get back to normal?

Looks like ca/mg, but it's too young. ca/mg does provide nitrogen as well though, so there you go.

I just upped the micro so here's hoping....