I am starting a Master Kush Seedling it's about 10 days old I am vegging with H.O. T5 also fresh sunlight when possible have a mix of F.F. Light Warrior and F.F. Ocean Forest soil they are growing in I also have a mandala seedling that is I'm growing the same way but it's 4 days older. I amd watering with P.H. balanced plain water with Great White root stimulator. The P.H. run off is 6.7 and 6.8 and the soil P.H. is 7.0. The Master Kush has what looks to be rust spots on the leaves other than those the plant is healthy, If anyone has an Idea of what this could be please advise.