Within the past few days I have noticed lot's of my leaves starting to look like this... They are under a 1K air-cooled hood and was never closer than 12in. from the top of the canopy... Temps stay in mid-low 70's. PH drifts from 5.8-6.1 and I'm running 2 separate nutrient lines and all plants are starting to show this so I'm thinking it's not a deficiency of some sort.... Any input guys? I have since raised the light to about 18in from the top of the canopy and it still seems to be progressing.
![2j27o13.jpg](http://i45.tinypic.com/2j27o13.jpg)
![2eewncw.jpg](http://i47.tinypic.com/2eewncw.jpg)
![ifzyvp.jpg](http://i48.tinypic.com/ifzyvp.jpg)