Having Some Trouble

I have been growing PurplePower in an aerogarden, it has been about 12 days since planting it after the germination. Some of the leaves are curling and browning, i was wondering if this could be because i was over spraying the leaves with regular water. Or is this a nutrien problem?(the leaves not curling and browning are also ones that have not been sprayed since they were being sprouted, but i am not certain its that.) If you can provide some helpfull information then please do.
PurpleP-9days.jpg
PurpleP- 12day.jpg
PurpleP -12 days.jpg
PurpleP Leaf2.jpg
PurpleP Leaf-12 days.jpg

The first picture is at 9 days before i started watering the new leaves.
the rest of the pictures are at 12 days old.
Do u think this can be from watering the leaves and making the light burn them? i am running the lights 24/7, I used two nutrient tablets because i had another plant growing but it fell over while i was at work and it died.So could this be nutrien burn or is it burning from the light
 
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