Light green leaves....Purple stems?

So I have started 5 feminized blue cheese (barney's farm)...They germinated in less than 48 hours....Planted them and sprouted in about 2 days....Looked healthy and dark green. Now about 8 days later they haven't even grown there second set of growth yet...They have turned a lighter green and stems turned purple slowly. Now I have two other plants that are 3 weeks old and I had a overwatering problem with one and backed off and its great. But I think this made me gun shy with the seedlings..only watering them very little every two days since sprout. Could this be the problem cause my other two I watered a little more in amount (150ml) and everyday for about the first two weeks and they grew out of control!....Frustratioin has set in so any help is greatly appriciated....

i really dont think the water is in cause..
u should really show us pic
we cant help like that.
ur problem might be anything

I agree you can't get help without more info. It's like saying; my car makes a noise what is it?

well here are the pics fella's. They all look exactly the same....the biggest plant is my norhtern lights that is fine and healthy. And there are 5 blue cheese doing the same thing. I have a 400w mh and a 400w hps. Intake and exhaust...There in miracle grow organic soil. Not feeding the little ones anything obviously and the NL flora nova and super thrive. If you need any more info to help let me know. I am super upset that these girls are not growing anywhere near what the NL and bagseed did....Please help I am getting desperate...

Well here they are I forgot to post them last one..ha

You can help urself tho ;P Giving to me by enigma

For all RIU'ers:

Plant Nutrient disorders in hydroponics, symptoms, causes, cures, fo