Spots on select leafs early veg stage

Spots on couple of leafs early veg stage about 3 weeks from sprout. Soil is m3 Michigan mix , lights mars hydro led tsw2000 , 7 gal cloth pot, temp 75-80, humidity ranges 35-65 depending on fans that are on. Any feed back would be great. Also it’s indoor tent. Ph 6.3-6.8

Looks to be a calcium and magnesium deficiency.


Funny name and avatar @Watt-Sun