A little sad today

I was just wondering could cal mag deficiency cause the plants to be a little sad? Yesterday they all looked really good now Here drooping a bit I'm growing in fox farms using vega matrix "very lightly" and teas with RO water I know sometimes after you water they will look droopy but yesterday they weren't droopy the day before that is when I actually watered, the top of the soil is slightly dry but the pots still feel heavy
 
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