Hi everyone, new grower and im getting these small little spots on top of 1 of 4 of my first grow and the first set of leaves seem to have started curling slightly. These 4 were germinated in paper towels and then moved to small pots in germinating soil once they had sprouted. They emerged from the soil a little over a week ago and have been growing nice until this once started showing these spots. They've all slowed growth a little. I haven't added any nutrients yet as their still young they've just been getting water and that's it. Am I right in thinking this could be a calcium/magnesium deficiency? These 4 are going into a rdwc system once ready.