brown on seedlying leafs

veg room is 2ft x 3ft x5ft
300w cfl veg blue only
2x 125mm pc fans intake and out take
6" desk fan "not on yet"
temp 22-24c
hum 35%-55% "trying to get higher with out using humidfier any help be nice"

ok on one of my baby plants its got the 2 starting leafs and 2 biger leafs the 2 leafs that look like canabis leafs are both 50% brown and curling up anyone have idea wats wrong i dont think its under water. maybe over water or becos of no nut? please help . i was watering every day with no nut's for 5 days "this is after i put into they 1st pots 4" ' but as of yesterday i started watering every 2 days "or till tops go dry" the next feed/water will have little nut in it will this help or is my baby done for.
ps i know its hard with out pics
i hate to see even one herting lol
 
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