Spotting on lower leaves?

[harris7]

I think you also have minor heat stress,

harris7 Reviewed by harris7 on 01-17-2007. Spotting on lower leaves? Setup: Simple Ebb & Flow PH ~ 6.0 Plant ~ 3.5 weeks from seed. Spotting on the lower leaves and slowly traveling up the plant. I thought MG def at first, but now I'm not so sure. Ideas? Rating: 5