I have 6 Master Kush seedlings nearing the third week of growth. They are in an E&F system under four 150W CFLs. They are under 24 hr light and are being watered every 6 hours with 1/5 strength nutes. My pH is kept between 5.7 and 6.1 at all times, checked 3 times daily. I have noticed that the new growth has sort of a reddish hue when it starts and then turns gree as the leaves get bigger. I also notice it on the underside of some of the larger leaves. Is this normal? Anyone know what might be causing it? Any helpful input is appreciated! Thanks!